Recalibration and Repairs

As a best practice, Apogee Instruments recommends recalibrating all pyranometers, quantum sensors, infrared radiometers, net radiometers, spectroradiometers and our other 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, you can visit our ClearSky Calculator tool or download the App for iOS or Android. The ClearSky Calculator indicates what your outdoor readings should be as a reference for comparison. Apogee can also calibrate several thermopile pyranometers from other companies. 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 or repair, please fill out the RMA Form with your request or email technical support with questions or your request. Please 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 for Apogee sensors are often found on a white label on the sensor cable, on a small sticker on the bottom of the sensor, on 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 $75 $100 LI-190 and LI-190R. Ask about additional models.
Silicon-cell Pyranometers $75 $100 LI-200 and LI-200R. Ask about additional models.
Thermopile Pyranometers (SP-510) $75 $275
UV Sensors $75
Infrared Radiometers $150
Spectroradiometers $150
Net Radiometers $365

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

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 >

Repair Prices

Repairs not covered under warranty or outside of the warranty period have a minimum charge of $50. Please see the owner's manual of the individual products for the specific warranty coverage terms. 

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 $20 $30 $40 $50
  Standard Expedited Express
Canada/Mexico $45 $55 $65
  Expedited Express
All Other Countries $80 $95

*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 (RMA) or recalibration request.

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

When filling out this form for warranty evaluation related issues, please review our warranty policies here first. 

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.