ASPIRATED SCREEN
RH SENSOR

Unit 11A
Farthing Road, Ipswich,
Suffolk IP1 5AP
Tel :- 01473 236236

 

Aspirated Screen RH% Sensor

The Stealth Electronics aspirated screen RH% consists of two matched temperature sensors. One of the sensors is in free air (DRY) and the other sensor (WET) is covered with a cotton wick with other end of the wick dips into a small water container. As the air movement across these temperatures sensors is forced across via a miniature brushless fan. The air past over the sensors causes evaporation to occur on the wet sensor.

This evaporation also cools the temperature of the wet sensor. By using this difference between these two temperature probes the system can calculate the actual relative humidity. This RH% reading will be displayed on the control system. This principle is based upon the Whirling Hydrometer. These types of sensors are typically used in potato stores and in the monitoring of mushroom sheds. For most other applications the electronics RH% sensor is more typically used. The internal water reservoir typically needs to be re filled with distilled water every 2 weeks.

The working range of the Aspirated screen RH% sensor is 0-100%. Its design allows the sensors to be in high humidity for extended periods of time without the sensors becoming saturated.


An in line waterproof connect allows for easy of maintenance. Method of attachment to the building is via a metal chain. This allows for the sensor to be placed directly where the actual RH% measurement is required.

Available from:-

Stealth Electronics Ltd
Unit 11A
Henley Road
Ipswich
Suffolk
IP1 5AP

Reg No : 4085431
Vat No : 759740879

tel: +44 (0)1473 236236
fax: +44(0)1473 236237