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Rugged 11 Thermocouple type & mV Calibrator Thermometer

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Item# CL3515R

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $441.29
5-9 $419.23
10-24 $410.40
25-49 $392.75
50-99 $383.92
100+ $375.10

In stock

Lead Time (If not in stock): 12 weeks
Calibrator/Thermometer CL3515R CL3515R
  • USB and RS232 Interface with Windows Software
  • 11 Types of Thermocouples: K, J, T, E, R, S, N, L, U, B, and C (in °C, °F, or K), and mV Signal Output
  • NIST-Traceable Calibration Certificate with 7 Data Points (Included)
  • 2 Channels for Thermocouple Temperature Measurement (T1 and T2) with Offset Adjustment

CL3515R Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

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

The CL3515R is a portable calibrator/thermometer with a 4-digit LCD. It is designed to use external K/J/T/E/R/S/N/L/U/B/C type thermocouples as temperature sensors. OMEGA™ offers a complete selection of thermocouples, or we can custom-design parts to meet your specifications. The thermometer features a dual thermocouple input and an adjustable thermocouple offset. The thermocouple types comply with the NIST monograph 175, revised to ITS-90 standards.

Thermocouple (Resolution) Measurement Range*:
    K: (0.1°) -200 to 1372°C(-328 to 2501°F)
    J: (0.1°) -210 to 1200°C(-346 to 2192°F)
    T: (0.1°) -250 to 400°C(-418 to 752°F)
    E: (0.1°) -250 to 1000°C(-418 to 1832°F)
    R: (1°) 0 to 1767°C(32 to 3212°F)
    S: (1°) 0 to 1767°C(32 to 3212°F)
    N: (0.1°) -200 to 1300°C(-328 to 2372°F)
    L: (0.1°) -200 to 900°C(-328 to 1652°F)
    U: (0.1°) -200 to 600°C(-328 to 1112°F)
    B: (1°) 600 to 1820°C(1112 to 3308°F)
    C: (1°) 0 to 2316°C(32 to 4200°F)
* According to temperature standard ITS-90.
    Thermocouple Types K/J/T/E/L/U:
    ±(0.05% rdg + 0.5°C) -50 to 1372°C[±(0.05% rdg + 1.0°F) -58 to 2501°F]
    ±(0.05% rdg + 1.0°C) -50 to -250°C[±(0.05% rdg + 2.0°F) -58 to -346°F]
    Thermocouple Type N:
    ±(0.05% rdg + 1.0°C) -50 to 0°C[±(0.05% rdg + 2.0°F) -58 to 32°F]
    ±(0.05% rdg + 0.5°C) 0 to 1300°C[±(0.05% rdg + 1.0°F) 32 to 2372°F]
    Thermocouple Types R/S/B/C:
    ±(0.05% rdg + 2°C) 0 to 1767°C[±(0.05% rdg + 4°F) 32 to 3212°F]
Thermocouple Simulation Range:
    Resolution: 0.1° (1° for R/S/B/C)
    Accuracy*: ±(0.3°C + 10 µV)
* Accuracy is specified for operating temperatures from 18 to 28°C (64 to 82°F) for 1 year, not including thermocouple error.
mV Range: -25 to 75 mV
    Resolution: 10 µV
    Accuracy: ±0.025% + 1 digit
Temperature Coefficient: 0.1 times the applicable accuracy specification per °C from 0 to 18°C and 28 to 50°C (32 to 64°F and 82 to 122°F)
Display: 4-digit LCD with max reading of 19999
Input Connector: Miniature thermocouple connector (SMP type) Power: 9V battery (included)
Battery Life: 17.5 hours nominal with low-battery indicator
Dimensions: 192 H x 91 W x 52.5 mm D(7.5 x 3.5 x 2.1")
Weight: 320 g (0.7 lb)
Environmental Ambient Operating Ranges: 0 to 50°C (32 to 122°F), <80% RH
Storage Ranges: -20 to 60°C (-4 to 140°F), <70% RH
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Rated 2 out of 5 by from OK Quality 2 channel calibrated unit We bought this because it is calibrated. Seems susceptible to EMI. The HVAC system combined with other adjacent CE compliant test equipment cause this to fail the self test. Other thermometers and test equipment do not fail under the same conditions. It is good that it reports the errors, but it would be nice if it was more robust. Good tech support to identify EMI as the cause.
Date published: 2017-06-27
Rated 1 out of 5 by from Does not work with Windows 10 This product will not work with Windows 10 and no relief in sight...
Date published: 2018-12-06
Rated 4 out of 5 by from Meets my needs I still have a lot to learn about all the capabilities of this equipment, but it works for my calibration needs. I would like to see more documentation on the capabilities and how to use them. What I have seen thus far is a bit lacking for me. I haven't had the opportunity to play with it outside of performing my calibrations. However, it is great for my calibration needs
Date published: 2018-10-25
Rated 5 out of 5 by from Impressive Accuracy I have purchased 3 of these over the past couple of years for training customers on properly performing SAT's and they work great. They are every bi as accurate as $2,000 calibrators we have used in the past and they handle a wide range of thermocouples.
Date published: 2017-10-10
Rated 1 out of 5 by from Rarely in specification Always having to adjust and issuing out of tolerances. Get what you pay for, buy a Fluke.
Date published: 2019-10-08
Rated 3 out of 5 by from Works, but not great It does produce a TC signal that is accurate and adjustable. There are 2 outputs, but they do not seem to be independent, they both put out the same signal. The temperature logging is kind of confusing and it is easy to get stuck in an unknown state. It also beeps very loudly each time you press a button.
Date published: 2024-03-21
Rated 5 out of 5 by from Staff Mechanical Engineer Simple and straightforward usage with multiple thermocouple type input accepted.
Date published: 2023-02-27
Rated 1 out of 5 by from Poor first impression, no OEM support available Of 3 new units we received, 2 were found to be out of tolerance in various ranges, the 3rd one very close to 100% tol. Can't get them adjusted either, since within Europe Omega no longer offers service for this model.
Date published: 2022-11-24
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Can I communicate with the unit through USB in my own program instead of the windows program. I am trying to use it under Mac so would like to open it as a serial port to control it. Is there any documents of Remote Programming Commands for the CL3515R?

Asked by: Apple
Hi Apple We do have command protocol for the CL3515R. Please email to request copy. Best regards OMEGA
Answered by: AENorwalk
Date published: 2020-04-03

What is the expanded uncertainty considering k=2 in degree C for the ranges of 0-100, 100-200, 200-300 and 300-400 degrees, thermoucouple type J. I could not find the information over the manual.

Asked by: mb0723
Hi MB0723, Thank you for the inquiry. This product is provided with stated accuracies only. Uncertainties are not provided unfortunately. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2023-07-31

Since most modern computers don't have disc drives, where can I download the software? I don't see it on the website.

Asked by: Some guy
Scroll to the bottom of the page. Under &quot;Quick Links&quot;, there is a section called &quot;Software&quot;. That will take you to Omega's web page containing all of their software. For this specific item, click on &quot;Temperature&quot;, then find this model number on the FTP site.
Answered by: Anonymous
Date published: 2024-05-07

I am having an issue getting the software to see the calibrator. When I plug it in and try to select a port it does not pull up an option to click anything. Any suggestions? Also is there any more information on how to calibrate than what's in the manual?

Asked by: Pyro
Please make sure you are selecting Run As Administrator to install the USB driver. Check the Device Manager to confirm the USB driver is correctly loaded and Windows assign a port number.
Answered by: NJENG
Date published: 2023-02-08

Does this unit come with the optical to USB interface cable, if not what is the P/N for the cable?

Asked by: Stroz
Thanks for connecting with Omega. The product manager has confirmed that this product does come with a USB cable.
Answered by: Jane
Date published: 2023-02-08

What is the refresh rate?

Asked by: Gior
Hi Gior, Thank you for the inquiry. Refresh rate is once per second. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2022-04-06

Does Omega offer a calibration/re-certification service for the CL3515R, and what is the suggested frequency of recalibration?

Asked by: CalibratorCL3515R
The CL3515R can be re-calibrated and it is recommended it be done once per year. This can be set up by the Customer Service group when you are ready to move forward.
Answered by: ApplicationsEngineerANB
Date published: 2022-04-18

my Calibrator when i turn it on gives error self test, how do i fix this

Asked by: timbo
Hi Timbo,MP Thank you for the inquiry. Please forward this request to TEMP@OMEGA.COM for review. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2022-12-10
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