Compare Model Drawings, CAD & Specs Availability Price
RM9 with Chopper
RM9 Radiometer System, Chopper, 100 nW to 100 mW, Ø8 mm, 0.15-12 µm
In Stock
In Stock

Full support available for the RM9 sensor with the Centauri, Vega, Nova II, Juno, Juno+, Juno-RS, EA-1, StarLite and StarBright and with the StarLab application.

There is limited support for the RM9 sensor with the older LaserStar, Pulsar, Quasar and Nova.

To upgrade the meters below to the version that fully supports RM9:
StarBright meters (rev 1.18 and higher) press here
Nova II / Vega meters (rev 2.44 and higher) press here
StarLite meter (rev 1.26 and higher) press here
Juno interface (rev 1.31 and higher) press here
Juno+ press here
Juno-RS press here
EA-1 press here
Centauri press here


  • Product Name
    RM9 with Chopper
  • Aperture Size
    Ø8 mm
  • Absorber Type
    Pyroelectric with Chopper
  • Spectral Range
    0.15-12 µm
  • Minimum Power
    100 nW
  • Maximum Average Power
    100 mW
  • Maximum Average Power Density
    5 W/cm²
  • Response Time
    3.5 s
  • Dimensions
    Ø62 x 21 mm
  • Includes Chopper
  • Cooling
  • CE Compliance
  • UKCA Compliance
  • China RoHS Compliance


Measuring Laser Power Below the Noise Floor with a Lock-In Amplifier

Measuring optical signals in the femtowatt (10-15) to nanowatt (10-9) range can be very challenging. This video explains how Lock-In Amplifiers can help make these measurements possible.

Measure Very Low powers Over a Very Broad Spectrum with the RM9 Radiometer

The RM9 system measures powers down to 100 nW over a very broad spectral range, from UV to far IR. This video introduces you to the RM9, and shows you how to use it.

Contact Us illustration

Have questions? Require assistance?

Click below to to contact Ophir Photonics and we'll get back with you shortly.

Contact Ophir Photonics