This product is no longer available and has been replaced by: EE181-L.
HMP45C-L Temperature and Relative Humidity Probe
Product Details
Restockable Yes
Warranty 1 year

Other Accessories

The SW12V provides a mechanism for older dataloggers that don't have a switched 12V port to control power to the HMP45C. The SW12V is recommended for applications where the HMP45C will be measured by a CR500, CR510, 21X, CR7, or a CR10 with a silver wiring panel.

History: prior to May 2004, the HMP45C cable included a switching circuit that switched power to the sensor only during measurement, fhus conserving system power. Effective 3 May 2004, the switching circuit was removed from the HMP45C cable. The redesigned HMP45C connects to the datalogger's switched 12 V terminal. Dataloggers that do not have a switched 12 V terminal (i.e., CR500, CR510, 21X, CR10 with a silver wiring panel, or a CR7) can use a SW12V Power Switch Assembly to switch power to the HMP45C.
The 41003-5 provides a 10-plate naturally-aspirated radiation shield that houses one HMP45C probe. Its louvered construction allows air to pass freely through the shield thereby keeping the probe at or near ambient temperature. The 41003-5 attaches to a crossarm, mast, or user-supplied pipe with a 1.0" to 2.1" OD.
When exposed to sunlight, the HMP45C-L must be housed in a radiation shield. The RAD14 uses a double-louvered design that offers improved sensor protection from driving rain, snow, and insect intrusion. It also has lower self-heating in bright sunlight combined with higher temperatures (> 24°C (~75°F)) and low wind speeds (< 2m/s (~4.5 mph)), providing a better measurement.