Dew sensor, SY-DS-1 is a switch-type humidity sensor with a non-linear response. Condensation could be predicted in advance and prevented by a prompt response. Dew sensor could be used to monitor and control humid atmospheres in many fields, such as storage, plant growing, and electronic product manufacturing.

Description

The sensitive layer of the dew sensor is composed of conductive particles and a hydrophilic polymer matrix with swelling-shrinkage properties.

At low RH (Relative Humidity) conditions, the space between the conductive particles is small enough to form conductive channels, so it has a low resistance.

increase of RH, the polymers swells with increased water molecules, and the space between conductive particles increases slowly, so the resistance increases.

When the RH level is above 90%, the space between conductive particles in the sensing layer increases rapidly due to the rapid swelling of the polymer.

As a result, The conductive channels barely exists, and resistance increases sharply.

Datasheet

Product Specification

Electrical Characteristics

Resolution	14 bit (0.01%RH)
Rated voltage	DC AC 0.8V Max.
Operating temperature range	0℃ ~ +60℃
Operating humidity range	0%RH ~ 100%RH
Storage condition range	-20℃ ~ 85℃
Standard characteristic	10㏀ Max. at 80%RH
	100㏀ Max. at 93%RH
	200㏀ Max. at 98%RH

Characteristic Chart

Dew Sensor (SY-DS-1x)
Application:

In water treatment plants or industrial plants, to detect condensation of cold pipeline networks.
In hangars and storage rooms to detect condensation on cold outside walls or steel doors and to protect the masonry.
In control cabinets or machines to detect condensation on sensitive electronic components.
In buildings with chilled ceilings or ventilation, air conditioning, and heating plants.
In swimming pools or on shop windows around the glazing fogging with optimized use of energy or to keep free of ice.