The HP range includes mains powered, auxilliary DC powered and loop powered versions with a combination of RH, RH and Temperature, or, Temperature only options.
The probes use capacitive sensors that have been designed to withstand a variety of atmospheres and to operate over a wide temperature and relative humdity range. For protection we offer the probes with either a plastic cage, a sintered bronze guard or optionally a stainless steel guard. Furthermore, the duct mounting probes/transmitters can be specified with either a table E flange or a compression fitting and apart from the standard length probes we also offer extended length probes for those applications requiring precise sensor location.