LPN-H (rev 1) - Relative Humidity & Temperature Transmitter:

Product Specifications:

Download Humidity Measurement Brochure

Download Installation Guide

Download Sensirion SHT2x Digital Sensor Calibration Certificate

Information on Calibration system for LPN-H series Humidity sensors >>

Download LPN-H-W Print Quality Image - 0.27MB.

Download LPN-H-D Print Quality Image - 0.29MB.

LPN-H-W (Wall Mount)

LPN-H-D (Duct Mount)


The LPN-H is a complete relative humidity and temperature sensing module, with two loop powered 4~20mA output signals, representing 0~100%RH and 0~100ºC.

Two versions are available:
(i) Wall mount.
(ii) Duct mount.

Both versions come complete in an industry standard aluminium connection head.
The digital relative humidity sensor and temperature compensating sensor protrude from the head inside a protective cap. This cap allows air to circulate to the sensors.


Ordering Information:

LPN-H-W (rev 1) Wall Mount, 0~100%RH Transmitter, 0~100ºC Transmitter.
LPN-H-D (rev 1) 220mm Duct Mount, 0~100%RH Transmitter, 0~100ºC Transmitter.
LPN-H-F 100mm Flange for LPN-H-D.

Note: 0~200ºF temperature output optional. Please specify when ordering.



The wide range of the humidity and temperature sensors offer long term reliability over a broad range of applications. The sensors resist contaminating vapours such as organic solvents, chlorine, and ammonia.

Calibration system for LPN-H series Humidity sensors:

The LPN-H-Ref system is designed to allow in situ calibration of LPN-H-W and LPN-H-D humidity transmitters. The LPN-H-Ref system consists of corrosion resistant stainless steel canisters containing humidity regulating salt solutions that replace the black protective filter on the sensor.

Important Note:
It is essential that the humidity sensor is mounted vertically with the filter at the bottom to prevent spillage.

Ordering Information for Calibration LPN-H-Ref:

LPN-H-75 Calibration canister with 75% RH salt solution. LPN-H-Ref
LPN-H-43 Calibration canister with 43% RH salt solution.
LPN-H-33 Calibration canister with 33% RH salt solution.

Older LPN-H model (with Monolithic IC Humidity Sensor) Download:

Older LPN-H Installation Guide