CS240 PT-1000 Class A, Back of Module Temperature Sensor
Proven Rugged Design
Class A accuracy at any cable length
weather applications supported water applications supported energy applications supported gas flux & turbulence applications supported infrastructure applications supported soil applications supported


The CS240 is a surface-mountable PT-1000 Class A RTD in a ruggedized form factor commonly used in solar-energy applications to measure back-of-module temperature with the highest level of accuracy. To withstand the harsh treatment commonly seen in MET station installations, the RTD is safely housed inside a specially designed self-adhesive aluminum disk.

Benefits and Features

  • Precision PT1000 Class A Sensing Element
  • Compliant with IEC 60751, DIN EN 60751 (according to IEC 751)
  • Any cable length available—user-selectable or standard lengths offered
  • Rugged design holds up in harsh conditions and conduit installations
  • Self-adhesive backing for easy mounting lasts decades
  • 2-wire and 4-wire configuration to satisfy channel count and accuracy—even at long cable lengths


Glam view
Glam view
Glam view
Full view with cable
Full view with cable
Left view
Top view
Bottom view


Element Type Precision 1000 Ohm Class A platinum sensing element
Tolerance ± (0.15 + 0.002t)
Temperature Coefficient TCR = 3850 ppm/K
Long-Term Stability Maximum Ro drift 0.04% (after 1000 h at 400°C)
Measuring Current 0.1 to 0.3 mA
Operating Temperature Range -40° to +105°C
Disk Material Anodized aluminum
Cable Jacket Material Black semi-gloss PVC, UL VW-1 sunlight-resistant for outdoor use
Disk Diameter 2.54 cm (1.0 in.)
Overall Probe Length 6.35 cm (2.5 in.)
Overmolded Joint Dimensions 5.72 x 1.12 x 1.47 cm (2.25 x 0.44 x 0.58 in.)
Weight 90.7 g with 3.2 m cable (0.2 lb with 10.5 ft cable)


Wire Size and Type 24 AWG (7/32) tinned copper
Insulation Type PVC
UL AWM 10012 1000V 105°C
Filler Fibrillated polypropylene as required for uniform round construction
Drain 24 AWG (7/32) tinned copper (cabled, touching foil)
Shield Aluminum/Mylar (100% coverage, 25% minimum overlap, foil facing in)
Nominal Wire Diameter 0.61 mm (0.024 in.)


-NOTE- Compliance information can be found in the Documents section of the web page.
Approvals UL AWM 2586 1000V 105°C; CSA AWM 600V 105°C FT
EMC Compliance Conforms with Electromagnetic Compatibility Directive (EMC).
RoHS2 Conforms with the Restriction of Hazardous Substances Directive (RoHS2).


The CS240 is compatible with these current dataloggers:

  • CR300-series
  • CR800-series
  • CR1000
  • CR3000
  • CR6-series
  • CR1000X

The CS240 is compatible with these retired dataloggers:

  • CR10X

Listed Under

Other Accessory for the following products: