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500 Hour Thermocouple Calibrator with 0.01° Resolution

Industrial Thermocouple Handheld Calibrator
  • RoHS Icon
  • Approuvé CE

C$2 575.07

Article# CL945A

Remises de volume disponibles
Calendrier de remise sur volume
Quantité Prix unitaire
1-4 C$2 575.07
5-9 C$2 446.32
10-24 C$2 394.82
25-49 C$2 291.81
50-99 C$2 240.31
100+ C$2 188.81

En stock

Délai de livraison (si pas en stock): 9 semaines
Industrial Thermocouple Handheld Calibrator CL945A CL945A
  • Handheld Thermocouple Calibrator with ±5 µV accuracy
  • Resolution: 0.01°
  • 10x Battery Life
  • Simultaneous Source / Measure

CL945A Options de modèles

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Type of Thermocouple Signals
Type of RTD signal
Type of Thermistor Signal
Accuracy Value
Communications Protocol
Battery Run Time
Additional Features

The OMEGA CL940 series thermocouple calibrator simulate, measure and record thermocouple. It Surpasses any device in the market the competition in the lab and on the factory floor with ±0.003% (Rdg) ±5 µV accuracy and in ambient temperatures from 18 to 28°C (64 to 82°F).

This powerful handheld calibrator/meter allows the user to calibrate in the field as well as in the lab and offers many additional functions that translate into cost-effectiveness, improved efficiency, and long-lasting adaptability and dependability. OMEGA has rethought temperature calibrators to offer you the performance you need today without complicating your work. The new 940 Series provides laboratory grade calibrations in a highly portable package that goes to the work-site with ease. Industries that measure temperature are being pushed to achieve better results for both quality and product safety. OMEGA has responded by designing an instrument that leads its class in terms of accuracy, battery life, convenience and ease of use.

When you endeavor out into the field or plant to perform service work, you need a durable tool that you can count on. OMEGA has over 40 years of experience building handheld instruments for challenging environments. That’s why we designed the 940 series to meet MIL-PRF-28800F for shock, drop and vibration tests. The keypad is a sealed design that rejects fluids and dirt without compromising tactile feedback. No matter how valuable the tool is, it is useless with dead batteries. We gave the 940 Series extraordinary 10X battery life of its competitors with 3 AA batteries so that you aren’t disappointed in the field.

More rigorous calibration requirements drive the need for better tools. Tighter process controls and quality standards mean your old calibrator doesn’t measure up anymore. OMEGA has designed the most accurate calibrator in a portable package. While it is tough to recreate the temperature controlled atmosphere that a lab provides, you can use a device that delivers laboratory grade precision with clear specifications that let you determine the exact level of field performance you do achieve. OMEGA’s new 940 Series calibrators compensate for the ambient temperature. It will allow you to perform calibrations with confidence in diverse conditions.

A competent instrument can often imply intricacy. OMEGA engineers appreciated the simplicity and designed the 940 Series to be easier to use. Our goal was to make the operator productive when they first picked up the instrument. With one key, the user can perform a 10% / 90% calibration without understanding the manual. Another key increment 0%/25%/50%/75%/100% for rapid 5 point checks. Setting any specific temperature is equally comfortable as are step and ramp modes.

The 940 Series calibrators are designed, assembled and tested in the United States. OMEGA backs this durable instrument with a standard 2–year warranty to assure you that your investment is sound


Source / Measure Accuracy

±0.003% (Rdg) ±5 µV

18 to 28 °C


1 µV, 0.01°C UP TO 999.99°C AND 0.1°C ≥ 1000°C

Cold Junction Error



-15mV – 85mV



Two (2) rows of Five (5) digit LCD with separate minus sign, decimal indicators, with offset, thermocouple types KJTEBNRSGCDPLU, battery, source, read, temperature units, voltage units, percent, trend, PRST (0-19), MIN, MAX, AVG, RNG, STDEV, Transfer, symbols: Fast Ramp, Slow Ramp, Step, Bluetooth

Connector Type


Temperature Units

°C, °F, mV

Probe Zero Function

Resolution 0.1 °C/°F

Reading Rate

3/sec. for Readings and TREND indicators

Battery Type

3 AA (IEC LR6, ANSI 15) Alkaline

Battery Life

500 Hours

Battery Indicator

Four (4) Stage Battery Charge Indicator


Min, Max, Avg, Rng, and Std Dev

Auto Off

20 minute no key pressed Auto Off. Feature can be disabled

Power Cycle Configuration Retention

Instrument retains: Sensor Type, Temperature Unit

Offset Values, Presets, Statistics, Open Lead detection status, 0%/100% span settings, and operating mode

Internal Preset Storage

20 Preset user-determined storage registers, 0-19

Input Current

±50 nA maximum

Maximum Common Mode Voltage

42 V peak to earth

1 V p-p between T1 and T2

Low Resistance Load

Less than 5μV change in output with a 100KΩ resistance

Operating Environment:


-20 to 55 °C

-4 to 131 °F


5 to 95%, 10 to 30 °C


0 to 4600 m

0 to 15,092 ft.


Random 10-500 Hz, 0.03 g2/Hz


30g Half Sine


4 drops from 1 m to concrete

Compliance, Electrical

CE, MIL-PRF-28800F Class 2

Compliance, Substances

RoHS 2 Directive 2011/65/EU Compliant, REACH


193 X 84 X 28 mm

7.6 X 3.3 X 1.1 in.


362.9 g

12.8 oz


3-year Parts & Workmanship

Calibration Guarantee

2 year

Included Accessories

3 AA Batteries, Quick Start Guide, Tilt Stand/Magnetic, Calibration Report

Optional Accessories

1.             CL-300-CABLE-K-2      CABLE FOR CALIBRATOR Thermocouple Type K,  2 feet long

2.             CL-300-CABLE-J-2      CABLE FOR CALIBRATOR Thermocouple Type J,  2 feet long

3.             CL-300-CABLE-E-2      CABLE FOR CALIBRATOR Thermocouple Type E,  2 feet long

4.              CL-300-CABLE-T-2      CABLE FOR CALIBRATOR Thermocouple Type T,  2 feet long

CL940A/CL945A Source / Measure Accuracy* over range of 18 to 28°C (64.4 to 82.4°F) | CJC error included


TC Type

°C Range


TC Type

°C Range



-200 to -160

±0.7 to ± 0.5


-240 to -150

±1.2 to ±0.4

-160 to -110


-150 to -100


-110 to 10


-100 to 20


10 to 1200


20 to 1000



-230 to -160

±1.2 to ±0.6


-260 to -190

±2.6 to ±0.7

-160 to -90

±0.5 to ± 0.4

-190 to -120

±0.6 to ± 0.5

-90 to 380


-120 to -70


380 to 665


-70 to 80


665 to 1372


80 to 400


* See Graphs in Manual for Detailed Accuracies

CL945A Source / Measure Accuracy* over range of 18 to 28°C (64.4 to 82.4°F) | CJC error included


TC Type

°C Range


TC Type

°C Range



-230 to -150

±1.6 to ±0.7


-200 to -75

±0.8 to ±0.5

-150 to -50


-75 to 0


-50 to 215


0 to 385


215 to 1300


385 to 600



-15 to 100

±1.2 to ±0.8


310 to 595

±1.8 to ±1.0

100 to 240


595 to 830


240 to 495


830 to 965


495 to 1768


965 to 1820



-20 to 75

±1.2 to ±0.9


100 to 240

±1.0 to ±0.6

75 to 150


240 to 310


150 to 285


310 to 460


285 to 1768


460 to 2315



0 to 60



0 to 100

±0.6 to ±0.5

60 to 2200


100 to 230


2200 to 2315


230 to 2315



-200 to -90

±0.6 to ±0.4


0 to 1395


-100 to -40


-40 to 655


655 to 665


665 to 900


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Rated 5 out of 5 by from great product, needs accessories great use for our purpose, If they have included male to male extension for the TC calibration it would have been great.
Date published: 2024-04-29
Rated 4 out of 5 by from Works as we need it to. A bit too expensive Tool works great. Meets our needs although requires a capacitor the older model didn’t to calibrate multiple zones at once.
Date published: 2023-05-08
Rated 5 out of 5 by from Director Very reliable and trustable , have been working with Omega for two decades
Date published: 2023-04-11
Rated 4 out of 5 by from CL 940 review Excellent unit, but wish it had a rubberized protective grip case like our CL25 does
Date published: 2020-09-28
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loading all QA

Does this calibrator support the "step" feature like the CL27? It's the bottom center button on the CL27. The main use I have for the calibrator is to set 3 different temps and quickly "step" through them to do up to 60 TC oven jacks.

Asked by: BenC
Thank you for your inquiry. This unit does have a 'Step' Feature.
Answered by: Application Engineer CB
Date published: 2021-11-29

Can this device be used as a thermometer as well as a calibrator, like the CL23A ?

Asked by: DanTheMan
Hi Dan, Yes this can be used in measure and calibrate modes similar to the CL23A. Best regards, OMEGA
Answered by: AENorwalk
Date published: 2020-04-03

Does the calibrator come with a certificate of calibration?

Asked by: DcnJoe
Hi DcnJoe Thank you for the request. Yes NIST calibration report is included. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2024-07-12
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