WH-N

Formaldehyde gas sensor

The WH-N formaldehyde gas sensor is based on the principle of micro fuel cells for detection. When formaldehyde gas is present in the environment, gas molecules quickly reach the core detection unit of the sensor through natural diffusion and concentration polarization, and undergo oxidation reaction at the positive electrode. Oxygen in the environment undergoes reduction reaction at the negative electrode of the sensor, forming a closed loop reaction. The generated current is proportional to the concentration of formaldehyde gas in the environment. By detecting the magnitude of the generated current, the formaldehyde gas content in the environment can be accurately quantified. The sensor pioneered the use of fuel cell solid electrolyte, which is safe, reliable, and has a long service life. Sensors have excellent anti-interference properties and are not affected by low concentration interfering gases in the environment. Sensors are passive components that do not require any external excitation during the reaction process, with zero power consumption. They are very suitable for portable instruments and places that require battery power.

Specification Download Leave a message

Features

High Anti Interference Ability

High Precision

High Sensitivity

Long Service Life

Wide Linear Range

Fast Response Speed

Excellent Repeatability and Stability

Technical Indicators

Operation Manual

Detection Principle	Micro Fuel Cell
Range	0-1ppm
Maximum Overload	5ppm
Sensitivity	200±100(nA/ppm)
Response Time	＜120 秒
Baseline Range（20℃）	±30ppb
Repeatability	2%
Linearity	-40℃～70℃
Temperature Range	Standard Atmospheric Pressure±10％
Humidity	10％－90％(Non condensing)
Service Life	6 Years (normal use)
Warranty Period	12 Months
Weight	3g

Typical Applications

Fresh Air System

Detectors

Air Purifiers

Handheld Detector

Air Conditioning

Purifier