Cyclops™ Infrared Thermometers- Another Update

An Update on the Handheld IR Thermometer line that took over from DFPs*

Cyclops 100 L - High Temperature applications
Cyclops 100 L – High Temperature applications

The NEW Land Cyclops L family of high quality portable non-contact thermal infrared radiation thermometers provides spot temperature measurement with incredible accuracy and reliability.

The Cyclops product line is still going strong after nearly 30 years! (Note that the terms ‘radiation thermometer’ and ‘infrared thermometer” no longer appear on the Ametek-Land webpage that describes these measurement instruments! Clearly that’s an effort to simplify the terminology of these devices.)

Features such as a precision view of the measurement target spot with simultaneous digital display of temperature in the viewfinder, choice of operating and calculating modes, digital output and out of range alarms are provided as standard.

The Cyclops L family of non-contact portable thermometers introduce several new features to this instrument “dynasty”.

*With the introduction of the Minolta-Land Cyclops 52 in the 1980s, Land Instruments basically replaced the widely used Optical Pyrometer, AKA Disappearing Filament Pyrometer (DFP), sold world-wide by Leeds & Northrup Corporation (now defunct).

(ED NOTE: Land took over the full line when Minolta Camera Company merged with Konica and then withdrew from the camera business in the early 2000s.)

Below are some of the features of the latest models

  • On-board Data Storage – Up to 9,999 measurement points, stored inside the thermometer
  • Unique Route Manager – Ideal tool for plants with multiple locations, which you need to monitor on a regular basis. This includes pre-configured location settings for emissivity and window correction – no requirement to make a change to a Cyclops at different locations.
  • UKAS Calibration (option) – Full UKAS calibration in the Land on-site labs
  • New Logger Software – allows users to connect a Land Cyclops Portable thermometer to a personal computer or mobile device and view, analyse and record live temperature readings.
  • Added Protection – industrial rubber casing to withstand harsh environments for extended periods

The new Cyclops 055L Meltmaster is a dedicated high precision, portable non-contact thermometer, designed for accurate temperature measurement of liquid metal in foundries and steel plants.

The new Cyclops 100L is a general purpose, high temperature, portable non-contact thermometer, designed for accurate measurement of temperatures in the range 550 to 3000 °C/ 1022 to 5432 °F, in applications such steel, glass plus other high temperature applications.

The new Cyclops 160L is a general purpose, medium temperature, portable non-contact thermometer, designed for accurate measurement of temperatures in the range 200 to 1400 °C/ 392 to 2552 °F, in applications such steel, glass plus other medium temperature applications.

The unique features of the ruggedized Cyclops 390L portable non-contact thermometer make it the ideal instrument for accurate non contact temperature measurements in hydrocarbon-fuelled furnaces.

For more details on these latest models visit:

In The recent past we posted an article entitled: “New, Innovative IR Thermometer from the Minds of…on the original website (original webpage still at

Lost your Cyclops battery cover? Print one now!!!

Cyclops Battery Compartment coverAMETEK Land understand how easy it is in your busy industries to lose or break a small part like the Cyclops battery cover in day to day use.

AMETEK Land is again at the forefront of technology and have made the 3D design file (STL format) available to print on your own 3D printer.

No longer improvise a solution to hold the batteries in, just download the file, print and fit.

NOTE: For Cyclops B and L models only

Download the file by clicking here, print and fit it

Some Cyclops History

See if you can spot when the actual name changed from “Minolta-Land Cyclops” to just plain “Land Cyclops”. Given the fact that Land products are presently a part of the AMETEK product mix, it’s reasonable to expect a further designation change in the near future. (Hmmmm…“AMETEK Land Cyclops” sounds right)

In 2006 we wrote:

Land Cyclops C100 A “new” Cyclops™ Infrared Thermometer has been… created (that sounds best).

The Cyclops™ Model C100 from Land Instruments International has appeared on the scientific and industrial instrument marketplace without much ballyhoo and glitter.

Yet, its understated presence belies some remarkable things about it and its forebears.

Simply stated: it is the latest in a long family of Cyclopses*, the replacements for the venerable Optical Pyrometer. (It doesn’t sound quite right, but the root word is Greek, not Latin)

In its earliest incarnations in the 1980s as the Minolta-Land Cyclops were breakthrough devices, very innovative and actually more accurate in most uses than the century-plus, much venerated, old Disappearing Filament Optical Pyrometers.

The latest Cyclops, Model C100, is no less innovative in its own quiet way. It is the first portable IR thermometer, of which we are aware, to incorporate Bluetooth RS-232 communications capability.

A brief walk through Cyclops™ Past

When the first Cyclops Model 51 was sold, by the Land companies, then Land Pyrometers Ltd. in the UK and Land Instruments Inc. in North America, it was also understated, but powerful in the market.

In a few short years it and the even more capable Cyclops Model 52, displaced the Optical Pyrometer in all but a few uses.

Going back, first…in the beginning, in the late 1970s, Land Pyrometers, Infrared Division in the UK was developing their own high-temperature handheld IR thermometer to compete with the Leeds & Northrup (L&N) Optical Pyrometer which held a significant portion of the portable, noncontact temperature sensor market around the world.

(ED NOTE: Optical Pyrometers are also known familiarly as “Opticals” and “DFPs”. Some even called them “Paperweights”, they were so heavy.)

When, at around the same time, the Minolta Camera Company of Japan produced a prototype handheld, automatic thermometer that covered the most important portions of the industrial high temperature range.

In comparison with the Land planned unit, the Minolta design was compact, light, sleek and had SLR optics that were adjustable focus and gave a wide view of the observed area.

Then the two companies met.

Minolta-Land Cyclops 51F
Minolta-Land Cyclops 51F

Minolta had a great, well-designed instrument but no experience in the industrial markets. Whereas, Land had years of experience in the metals, glass and ceramics markets and their first prototype was already getting known as “The Meat Tenderizer” by most of the people charged with marketing it.

The “Meat Tenderizer”  was basically rugged and very ugly. Add to that the difference in experience in blackbody calibration and traceability (Land~100%, Minolta~50%) and it was a match destined to be made.

A deal was struck and Land began selling the Minolta-made instruments around the world except for the Japanese home market; Minolta retained that.

The Cyclops 51 and 51F and their successors and variants, the Cyclops 52, 152, 41, 241, 252 etc. were smaller, faster, lighter, less expensive than Optical Pyrometers and didn’t require as much user judgment or training.

They produced results that were just as accurate, if not better than an optical pyrometer measurement, and often did better even in the hands of a new user.

The Cyclops had six other significant features that distinguished them mightily from “Opticals”.

  1. First, they had a precision emissivity adjustment, something DPFs lacked. That meant immediate correction for an object’s emissivity, assuming it was known. No look-up tables needed.
  2. Second, they had an electrical signal output that could be recorded by a portable or fixed chart recorder and/or datalogger, or actually used as an input to a control system. Opticals never had a recordable output. They depended on the operator to manually write down a reading.
  3. Third, they were, and still are (in the higher temperature models), orders of magnitude faster than Opticals. They could follow rapidly changing temperature readily and with the output feature, record them reliably.
  4. Fourth, the temperature reading was digital and could be “peak-picked” to capture high temperature transients. Opticals could never be adjusted rapidly enough to catch a rapid change or spike in temperature.
  5. Fifth, a Cyclops 51 or 51F took only one 9-volt transistor-radio battery, available almost everywhere, to power it. Even today, the latest models use only a few small, common batteries. Plus there is an auxiliary line-power supply for use in semi-continuous datalogging situations. The DFPs used extra-heavy dry cell batteries that added to their 11 pound weight.
  6. Sixth, and most useful, the Cyclops had the wonderfully crisp, clear adjustable-focus Minolta optics with the measurement spot defined by a small graticle in the field of view, and, the field of view included the temperature display. The newer models incorporate an auxiliary digital readout on the side of the case, too. The DFP had a red-filtered view of the object being measured and it was oftern difficult to view the surrounding area.

Cyclops combined innovative features, especially its short response time of 0.08 seconds, have yet to be fully matched by any price-competetive Infrared Radiation Thermometer in the last 20+years.

No wonder the Optical Pyrometer has effectively vanished! (The evaporation of Leeds and Northrup under General Signal Corporation’s watch did help speed things along a lot, too).

Other companies, notably Ircon, Inc, Chino Instruments and Mikron Infrared (formerly Mikron Instrument Company, Inc. – now a part of LumaSense Technologies) produced competitive devices. They helped hasten the slide of the Optical Pyrometer into the realm of instrument antiquity.

We know of only two companies that make or sell Disappearing Filament Optical Pyrometers, ostensibly on the basis of “better accuracy” because of the short wavelength of 0.6 microns.

If the users don’t yet know, there has been a special Cyclops model around for several years called the “Meltmaster” (C228) with an effective wavelength of 0.55 microns.

Ircon (now part of Raytek Corporation, subsidiary of Fluke, Corporation, in turn a subsidiary of Danaher Corporation) and Mikron Infrared (now part of LumaSense Technologies, Inc.)  have similar models, too. Plus Mikron makes two color, ratio thermometers in a portable configuration.

The Cyclops Family Picture Album:

Cyclops Model 51 with Carrying/storage case
Cyclops Model 51 with Carrying/Storage case

Minolta-Land Cyclops 51F
Minolta-Land Cyclops 51F

First there was one Cyclops, the Model 51, then very shortly thereafter there were two, the 51 and 51F.

Yes, there were initially two different models because they were mostly analog instruments and used different linearizer circuits.You know when there’s two of anything what can happen next.

You got it, a family was born! These (above) are however, the  “proud parents”.

(Images courtesy, where we found a few on sale)

Cyclops 52 – Made The Market in the 1980s

The first all digital Minolta-Land Cyclops, Model C52. appeared a few years later and it really  smacked down the Optical Pyrometers in the marketplace!

The Model 52 was a revolution in silver-gray plastic. With switchable temperature scale, a, extremely wide temperature range, built-in math functions, super-fast and much more. All for a very reasonable price.

There are rumors of many, and this author knows of a few industry calibration labs, that began to have their Cyclops 52s certified at NIST as used in their own labs as Reference Standards for Radiation Temperature sources.

This was a major step forward in simplifying the traceability of radiation thermometer calibrations!

Land in the UK also offered traceable calibration certificates to the UK’s national calibration system at the time. (They did this in addition to offering a special line of secondary, traceable radiation thermometers and a set of primary fixed point reference cells at some key points on the ITS-90.)

Here’s an incomplete gallery of images and tidbits about the different Cyclops family members over the last twenty or so years.

Cyclops 390B Furnace Pro
Cyclops 390B Furnace Pro


Cyclops 390B Furnace Pro Infrared spot thermometer








From left to right, recent Cyclops Models are the New C100; the unit it replaces, the C153; the Meltmaster, C228; The Medium Temperature C241
From left to right, recent Cyclops Models are the New C100; the unit it replaces, the C153; the Meltmaster, C228; The Medium Temperature C241


From left to right, recent Cyclops Models are the New C100;

the unit it replaces, the C153; the Meltmaster, C228;

The Medium Temperature C241 and

the low temperature workhorse, the C300.


Cyclops-mini view

Cyclops Mini
Cyclops Mini – Image courtesy ebay







The mini Cyclops  was part of the response of Minolta-Land to the popularity of very low cost general purpose instruments like the Raytek Mini in the 1990s, but they couldn’t compete effectively on price and appear to have been discontinued. (Note: The Raytek Mini appears to have been discontinued since Fluke took over, but the Fluke 62 Max seems to be its decedent in a market dominated by very low cost handheld IR Thermometers, many with a built-in laser pointer.)

Minolta/Land Cyclops Compac3
Minolta/Land Cyclops Compac 3 (Image courtesy ebay)


There was an earlier low temperature Cyclops called the Compac 3. These can still be found regularly on





The Cyclops Family of the 1990s before the very low cost IR Temperature gun market heated up, included a wide range of products such as the Tele, with its very large mirror optical system for measuring near ambient temperatures at relatively long distance, shown in the background here and two special waveband units, one at 3,9 microns for looking through hot combustion gases and one at 3.4 microns for measuring thin plastics.

The high-performance C300 has survived nearly without change since the early 1990s. It, and the unique, but discontinued C300AF, an autofocus model that used the technology of Minolta’s autofocusing 35 mm cameras, were priced relatively high at the time and the latter didn’t last in the marketplace despite its incredible features and specifications.

Cyclops 152 with carrying case

Cyclops 152 as seen on

On the left is a side view of the Cyclops Model C152, the real workhorse of the family. For nearly 10 years, from the late 1980s to the late 1990s this was the unit used in many high-temperature places like metals processing plants, glass factories etc. The one pictured here was shown on ebay in December 2017 for the price of $1800!

It came with a sturdy carrying case, but its big innovation was the fully sealed body to resist the ingress of dust and moisture that were the biggest sources of instrument problems used in industrial plants.

Minolta engineered a complex, but reliable, inner-adjustable lens system that had no external screw threads.

Dirt didn’t “screw up” the threads anymore. It just made the best device on the market even more superior.

We are also still seeking a photo of the all-digital Cyclops 52 to add to this page to complete it. The case color and style of the Cyclops 52 was very much like the Cyclops 241 (shown above.)

Check back to see when we’ve found them.

Note: Cyclops is a Trademark of Land Instruments International Ltd.

Footnote: Why do I care about all this stuff?

Chalk it up to a combination of personal involvement and a misguided, possibly compulsive sense of history about temperature measurement devices, infrared ones in particular. I had a big hand in the introduction of the Cyclops to North America as the General Manager and then VP of Engineering of Land Instruments in the USA during Cyclops’s first, second and third generations.

I like to think that I helped make it a big part of the Land organization’s product portfolio by insisting on having it to sell in North America when the first prototypes were offered to Land by Minolta in the late 1970s.

Then, I actually got to use and see first-hand the remarkable accuracy, reliability and stability of the devices, especially the Cyclops 152, 241 and 300 Models, during the 1990s as the Senior Staff Engineer for Temperature Measurement at the now-closed LTV Steel Company’s Technology Center and the corporate manufacturing plants where we used them under some rough, industrial conditions.

At LTV Steel we not only recommended and/or actually equipped several in-house Calibration Laboratories with Cyclops models as certified traceable reference standards, but used them for process investigations and trouble-shooting on many hot-strip mills, taconite pellet process lines, reheat furnaces, annealing lines and process simulation devices.

They never failed in my experience of more than twelve years duration. I published several technical papers based in large part on field measurements in operating steel plants made with Cyclops family models.

Some of those very same devices may be still in use even though LTV Steel has evaporated as a corporation and most of its USA manufacturing plants are now part of the Acelor-Mittal organization.

P. S. Interested in a product listing or doing a sensor review? Check our vendor directories.

  • They are free and self service at and reviews are accepted.

  • For the site, Vendors only, please click here.

“Temperature units and temperature unit conversion”

A Useful Blog Post From

small temp scale image from Beamex
Beamex Image: click to view larger version. Reproduced with permission

Online — Beamex have also developed a Temperature Unit Converter and have placed it on their web site,

Click the link below to visit it:

The page covers most of the same topics that we do here, but with a slightly different perspective, especially the topic of the the Reamur temperature scale.

The topics covered are:

  • What is temperature?
  • International temperature scales
  • Temperature Units
  • Conversions between temperature units
  • Beamex temperature calibration products

Beamex’s business is calibration.

Since technology continues to rapidly progress, companies need to be more efficient with less resources. At the same time, new regulations put constant pressure on manufacturing operations to maintain a high level of plant safety and product quality. With these in mind, we are here to help our customers to find a better way.


Beamex Oy Ab
Ristisuonraitti 10
FIN-68600 Pietarsaari

Phone: +358 10 550 5000
E-mail: info[at]


Jarmo Hyvärinen
Phone: +358 40 5736520

Arja Lehto
Phone: +358 50 3842226

Email: myynti[at]


Beamex S.A.S.
253 Boulevard de Leeds
59777 Lille

Phone: +33 (0)3 28 53 58 27

Beamex Limited
Unit 1, Interchange 21
Centre Court
Leicestershire    LE19 1WR

Phone: 01455 821 920

Beamex, Inc.
2152 Northwest Parkway
Suite A
Marietta, GA 30067

Phone: +1 (800) 888-9892,
+1 (770) 951-1927


Beamex Oy Ab Shanghai Representative Office
Rm 401, #2 Bldg, 690 Bi Bo Road
Zhangjiang Hi-Tech Park
Shanghai 201203

Phone: (86-21) 6104 2292
Mobile: (86) 1380 1992 162
E-mail: yan.hao[at]

Beamex Oy Ab India Liaison Office
Stylus Serviced Offices, R-Tech Park
13th Floor, Building 2
Off. Western Express Highway
Goregaon East, Mumbai – 400 063

Phone: +91 (0)98 33102694
Fax: +358 10 5505404
E-mail: rajesh.panchal[at]

Beamex Oy Ab – Abu Dhabi
Al Odaid Office Tower, 10th Floor
Airport Road, P.O. Box 128 161
Abu Dhabi

Tel: +971 2 414 6666
E-mail: mark.slater[at]

Beamex Oy Ab Technical & Scientific Office
Novotel Business Park
6140 Dammam 32232

Tel: +966 54 3213282
E-mail: tariq.jafar[at]


A product with a unique advantage

EE33 sensor tube - thermal image
EE33 sensor tube – thermal image

Air humidity and temperature play an important role in meteorology. Highly accurate measurements of these climate parameters form the basis of accurate forecasts and meaningful records.

The E+E Elektronik Model EE33 series humidity and temperature sensor is the only one on the market with a double-heated probe. Both the sensor tube and the sensor element are heated.

An application note, free for download from their website, tells the rest of the story.

You can download it be clicking here.

If that does not work, as sometimes happens when organizations “refine” their websites, we have archived a copy in our database; it may be downloaded here: Humidity_measurement_meteorology

Related technical webpages & download from E+E Elektronik:

E+E Elektronik – the Sensor specialist for humidity sensors, CO2 sensors, moisture in oil, dew point, air velocity, flow and temperature sensors. As a specialist for sensors E+E Elektronik produces humidity sensorsCO2 sensorsflow sensors, transmitters, hand-held meters and  dataloggers for the measurement of relative humiditymoisture in oildewpoint,
air velocityflowCO2 and temperature. E+E also operates a nationally accredited calibration lab and is appointed to maintain the “National Standard for Humidity and Air Flow Speed in Austria”

World HQ

E+E Elektronik Ges.m.b.H.
Langwiesen 7
A-4209 Engerwitzdorf

Tel: +43 (0)7235 605-0
Fax: +43 (0)7235 605-8


E+E Elektronik Corp.
124 Grove Street
Franklin, MA 02038
United States

Tel: +1 508 530 3068
Fax: +1 508 346 3798

Temperature Calibration & Metrology Web Seminar Archives

Fluke Calibration’s Focus on Basics – RTDs – Digital & IR (Infrared Radiation) Thermometers

Calibration and Metrology Web Seminar Series

Online —  Fluke Calibration’s free online web seminars cover a wide range of calibration and temperature topics. More are scheduled monthly. To learn about upcoming events, check their web seminar page, or sign up for their e-news bulletins today.

If you have missed out on one of their live web seminar events, you can view the recordings in their web seminar archives. Here’s a list of current ones along with links to them (as of 1 August 2013). They are mostly in English, but several are also in Spanish.

Introduction to Temperature Measurement and Calibration

Techniques and Common Methods of Temperature Calibration

How Do You Know that Your Digital Thermometer is Accurate? »

How to Create a Temperature Measurement Uncertainty Budget »

Replacing Mercury Thermometers  Once and for All »

Kelvin and SI Units »

Redefinition of SI Units (Kelvin, Kilogram,  Ampere & Mole) »

How to Calibrate an RTD or Platinum Resistance Thermometer »

Cómo Calibrar un RTD »

How to Calibrate an RTD Using a Dryblock Calibrator »

Cómo Calibrar un RTD Usando un Calibrador de Bloque Seco »

Overcoming Drift: A Complete Guide to Maintaining Your PRTs »

Annealing an RTD: Why, When and How »

How to Maximize SPRT Measurement Performance »

Understanding Uncertainties Associated with Dryblock Calibrators »

How to Calibrate an IR Thermometer »

Como Calibrar Termómetros Infrarrojos »

Infrared Temperature Calibration 101 »

Advancements in Digital Thermometry Bridge Technology »

What is 0.06 PPM, Can Calibrate itself, and  costs much less that a bridge? »

Best Practices in Maintaining Temperature Calibration Equipment »

Making Laboratory Accreditation Work for You »

UKAS-Accredited Calibration & Supply of Pt-Rh thermocouples

(0 °C up to 1600 °C)

NPL_Brochure_PictTeddington, UK —  The UK’s National Physical Laboratory (NPL) offers a UKAS-accredited thermocouple calibration service (laboratory number 0478) for platinum-rhodium thermocouples using freezing points of zinc, silver and copper (up to 1100 °C) and the melting points of gold and palladium (up to 1600 °C). (Type B thermocouples are calibrated from 400 °C)

NPL also supplies calibrated platinum-rhodium thermocouples from stock. These are made from wires assembled into insulators and calibrated up to either 1100 °C or 1600 °C. Read more UKAS-Accredited Calibration & Supply of Pt-Rh thermocouples

Thermocouple calibration at NPL – Supply of cobalt-carbon eutectic fixed point

For calibration of thermocouples (1324 °C)

Melting point cell
Melting point cell

Teddington, UK — The UK’s National Physical Laboratory (NPL) now offers for sale the novel cobalt-carbon eutectic fixed point for thermocouple calibration with ultra-low uncertainties at 1324 °C.

The melting point cell consists of a high purity graphite crucible containing an ingot of cobalt-carbon alloy constructed from cobalt and carbon each having a purity of at least 99.999%.

The cells are supplied with an NPL certificate showing the melting temperature (uncertainty ± 0.55 °C, k = 2) of the cell determined, traceable to ITS-90, by radiation thermometry.

For more information visit the NPL webpage at:

National Physical Laboratory
Hampton Road
Teddington, Middlesex, TW11 0LW

Tel: 020 8977 3222
Related NPL Resources: Thermocouple calibration – calibration and supply of platinum-rhodium thermocouples (0 °C to 1600 °C)

No More Mercury Thermometer Support in USA

New Info Worth Reposting
The bulk of this article is from a NIST Press Release with edits that was originally posted on our companion news website, on 14 June 2012 as: NIST’s Drive to Replace Mercury Thermometers

Gaithersburg MD, USA — NIST researchers have developed a new website explaining the hazards associated with mercury thermometers and discussing potential alternatives for the temperature sensing needs of industry.

Reducing the amount of mercury in the environment by recycling mercury thermometers also helps to reduce the amount of electricity we need to produce, which in turn reduces the amount of coal burned. Read more No More Mercury Thermometer Support in USA

Triple Point Cell at 36.324 Degrees Celcius

About a unique Triple Point Cell based on Ethylene Carbonate  developed at Britain’s National Physical Laboratory (NPL) in a nearly 4 minute video from YouTube.

It’s kind of a commercial, but a really useful one. It explains about this special calibration tool and how it can and is being used to help verify the calibration of sensors designed to measure human body temperature.

How to Realize a Triple Point of Water Cell

From Fluke Corporation

In this video Matt Newman from Fluke Corporation’s Hart Scientific Division ( demonstrates the proper technique for realizing a triple point of water cell for temperature calibration.

Triple point of water cells are used for calibrating a variety of precision thermometers.

The triple point of water cell is an intrinsic standard with a temperature defined to be 0.010 °C. This temperature is the most important temperature of the International Temperature Scale of 1990 (ITS-90) which is used to define the Kelvin unit of thermodynamic temperature on the International System of Units (SI).

For more YouTube videos from FlukeCalibration visit where you may browse or subscribe to their new ones.

RTD Vendors

RTDs (Resistance Temperature Detectors)  are wire wound and thin film devices that depend on the temperature coefficient of electrical resistance of metals. As the temperature increases, the positive temperature coefficient of the metal produces an increasing resistance value.

You can read more about them and how they work on the companion RTD pages.

Some metals have a nearly ideal, linear coefficient, like platinum . While other materials have more non-linear coefficients, such a copper and nickel.

This page provides links to some of the vendors of these devices.

You may note some redundancy with links on related pages. A good part of that is due to the fact that some vendors supply more than one type of sensor, plus many provide technical, applications and related support to customers and prospective ones.

Reading vendors literature can be a great, but unstructured way, to gain some technical knowledge. The only danger is that it is hard to learn more than the vendor puts in their literature or what their salesperson knows.

That approach can be quite variable but certainly does not make it easy for you to evaluate products without benchmarks.

Some advice (non-definitive): check with more than one vendor and get some education about these sensors from other sources, too.

There are books and courses available. Check your local library’s technical section or a engineering or science library at a university or technical college or school or the ISA or someone on the ASTM E20 Committee on Temperature Measurement.

ASTM E20 has a special subcommittee devoted to just RTDs. You can find more about their RTD standards on the RTD Standards Page of this site.

Thanks for visiting.

General Resources for Vendors

Some RTD Vendor Web Sites:

  1. Advanced Sensing Products (USA)
    A secondary standard PRT and precision RTD probe manufacturer. They make own RTD elements to completely control product quality. Provide NIST traceable calibration services with temperature ranging from -189 to 850°C. Customers are in metrology, instrumentation, power industry, turbine manufacturers and the military.
  2. ARi Industries(UK) Ltd home page
  3. Biodata: New Products (UK)
  4. Burns Engineering, Inc. (USA) designs and manufactures temperature products, for all industries and processes, with standard, custom, and Hazardous Location approved models. ISO-9001 Registered. ISO-17025 Accredited.(RTDs, Thermocouples, Engineered Sensors, Transmitters, Thermowells and Accredited Calibration Service)
  5. Conax Buffalo Technologies(USA)
    A leading manufacturer of temperature sensors including thermocouples and RTDs In Buffalo (where else?) New York.
  6. Ephy-Mess GmbH (Germany)
    Sensorik für thermischen Motorschutz, für die Verkehrstechnik, für den Anlagenbau und für Laboranwendungen: Pt-100, Pt-500, Pt-100, Wickelkopffühler auf Pt-100, Ni- und Cu- Basis.
  7. HL-Planar Technik(USA)
    US Office in Scottsdale Arizona–A leading supplier of Nickel and Copper RTDs
  8. JMS Southeast, Inc.
    In Statesville, North Carolina, USA
  9. Jumo Process Control RTD Sensors and a lot more-home page
  10. La Termotecnica (Italy)(Italiana and English)LA TERMOTECNICA e’ una societa’ Italiana, fondata nel 1976 e’ una tra le prime aziende italiane a produrre e progettare con tecnologia propria sonde a termocoppia e termoresistenza.
    LA TERMOTECNICA, an Italian company set up in 1976, is one of the leading companies in Italy in the production and design of temperature sensors based on proprietary thermocouple and RTD technology.
  11. M & Ma Sensorstech (USA & CHINA)
    A cooperative venture with Anhui Tiankang Co. Ltd. a measuring instrument design and manufacturing company. Their primary product lines are Resistance Temperature Detectors, thermocouples, temperature transmitters, compensating cable and complete sensor assemblies. They specialize in OEM and private labeled equipment due to their low cost, ISO-9000 approved manufacturing capabilities.
  12. Precon, Inc. (USA)
    RTDs, NTC Thermistors and Humidity Sensors available in standards or custom probes. Precon also designs and builds controllers and can provide turnkey sensing and control solutions
  13. Pyro Electric Inc. (USA & INDIA)A ‘Design to Engineer’ manufacturer of Thermocouples, RTDs and their assemblies, plus Temperature and Pressure gages. They have a track record as suppliers to Oil Refineries, Petrochemical Plants and other process industries. They are ISO 9001:2000 certified along with ATEX 94/9/EC approved. Customers include Exxon Mobil, Petronas, Reliance, GAIL, L & T Ltd, and Samsung.
  14. RDF Corp.(USA)
    RDF in New Hampshire; well known for their unique flexible film sensors, too.
  15. The RTD & SPRT supplier listings on (USA)
    The Free & Self Service Directories of Temperature & Moisture Sensor Resources
  16. RTD Company, (USA)
    Cambridge, Minnesota
  17. SDI (USA)
    Sensing Devices Inc., in Lancaster PA
  18. Smith Systems Inc (USA)
    Brevard, North Carolina, Standard and Custom Sensors for Speed, Motion and Temperature – Cabling and Controls
  19. STOLAB (USA)
    Accurate Industrial Thermometers
  20. Temp-pro inc.(USA)
    From Northampton, Massachusetts, where custom is part of Customer.
  21. Tempsens Instruments India
    An ISO 9001/2000 certified manufacturer of all types of RTDs, Thermocouples,Thermowells, Calibration Baths and associated accessories such as Connection Heads, Compensating Cable and Ceramic Tubes. They offer High Accuracy RTDs for general and special purposes. They are available in Class A, B, ½ , 1/3 , 1/5 DIN, 1/10 DIN with various sheath material such as SS304, 316, 310, Hastalloy,  Monel etc.
  22. THERMOCOUPLES & RTD’s (Zambia)
    Yes, Zambia in Africa
  23. Thermo-Electra b.v.(Netherlands)
    “Your partner in temperature sensors”-Industrial thermocouples RTDs and Thermowells
  24. Thermo-Kinetics (Canada)
    Manufacturing help from knowledgeable folks headquartered in Mississauga ONT with regional offices throughout the Provinces. where service is foremost!
  25. Weed Instruments(USA)
    Corporate Home Page From Texas
  26. Xian Diamond (China)
    Supply RTDs and assemblies mostly to OEMs.