Description:

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.

Features:

• NEW Sensirion SHT25 Digital Humidity Sensor.
• Long Term Stability.
• Fast response: 4 seconds from 0 to 100%RH under ideal conditions.
• Dual 4~20mA Outputs.
• %RH Temperature Compensated Linear Output.
• Pt100 RTD Sensor.
• Temperature Output 0~100ºC (0~200ºF optional).
• Temperature Output Linearised.
• Very Compact Design.
• High Accuracy.
• Low Cost.
• Easy to Install.
• Reverse Polarity Protection.
• Wide Power Supply Range.
• Rugged and reliable.

Ordering Information:

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

Reliability:

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:
Call for these 

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