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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 $427.61
5-9 $406.23
10-24 $397.68
25-49 $380.57
50-99 $372.02
100+ $363.47

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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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: 2020-01-23

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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