Recalibration and Repairs

Apogee Instruments recommends recalibrating all sensors every two years. You may wish to wait longer between recalibration cycles depending on your particular requirements. To determine if recalibration is necessary for pyranometers and quantum sensors, visit our information on the Clear Sky Calculator. For information on Apogee's Class A, Class B, and Class C thermopile pyranometer calibration services, please visit thermopile pyranometer calibration services.

To send your sensor in for recalibration/repair, please fill out the RMA Form with your request. Or, email technical support with your request, include the model and serial number(s) with a brief description of your request. For broken sensors, describe the nature of the malfunction.

*Model and serial numbers are found on a white label on sensor cables, the back-side of meters, or the underside or back of spectroradiometers.

Once you’ve been issued an RMA number please make attention to that number on the outside of the package and ship to:

Apogee Instruments
721 W 1800 N
Logan, UT 84321, USA

Please do not send any products back to Apogee Instruments until you have received a Return Merchandise Authorization (RMA) number from our tech support department.

Send all RMA sensors and meters back in their original, unmodified condition:

  • clean the sensor’s exterior and cord
  • do not modify the sensors or wires, including splicing, cutting wire leads, etc.
  • if a connector has been attached to the cable end, please include the mating connector – otherwise the sensor connector will be removed in order to complete the repair/recalibration

Failure to do the aforementioned may result in an additional service/repair fee prior to calibration. For questions, contact Technical Support.

Recalibration Prices

 Apogee SensorsOther Companies' SensorsOther Companies' Models We Calibrate
Quantum Sensors $50 $70 LI-190 and LI-190R. Ask about additional models.
Silicon-cell Pyranometers $50 $70 LI-200 and LI-200R. Ask about additional models.
UV Sensors $50
SP-510 Thermopile Pyranometers Standard Calibration $50
Infrared Radiometers $100
Spectroradiometers $100
Net Radiometers $195

For Apogee SP-510 and other companies' classified pyranometers visit ISO Thermopile Pyranometer Calibration Information and Pricing >

Repairs outside of the warranty period have a minimum charge of $50.

Calibrated infrared radiometers, spectroradiometers, and all other sensors are returned with a calibration certificate that shows the procedure, traceability, and coefficients.
View example infrared radiometer calibration certificate >  View example spectroradiometer calibration certificate >

Return Shipping Cost

Click here to estimate shipping times within the United States >

Click here to estimate international shipping times >

  Ground 3rd Day 2nd Day Next Day
USA $15 $25 $35 $45
  Standard Expedited Express
Canada/Mexico $35 $45 $60
  Expedited Express
All Other Countries $60 $75

*For international orders, we use UPS Worldwide Standard, Expedited, and Express. To use a different carrier, you must have an account and you will be charged a $50 document fee.

Use the form below to submit a return request.

If the form is not appearing on this page, you can access it here.

Fill out my online form.

If you have questions or need additional support for any of our products, please contact Apogee tech support by email at

One of our support specialists will respond as soon as possible during business hours which are M-F 8AM - 5PM MST.