This product is no longer available and has been replaced by: EE181-L. Some accessories, replacement parts, or services may still be available.
HMP35A Temperature and RH Probe


The HMP35A Temperature and RH probe was replaced with the HMP35C; the HMP35C was eventually replaced with the HMP45C-L. Initially, the HMP35A was Vaisala's production line model that had a Platinum Resistance Thermometer (PRT) for measuring temperature and a HUMICAP-H sensor for measuring relative humidity. It required continuous 12 V power; no switching circuit was included.

Campbell Scientific eventually modified the HMP35A to include a 107 for measuring temperature. For about a month, Campbell Scientific continued to call the modified probe, the HMP35A. Eventually, Campbell Scientific renamed the modified probe the HMP35C.



Datalogger Considerations

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR7X CR5000