SS21F8-LE (HCHO) Electrochemical Formaldehyde Sensor (0–10ppm)

The SS21F8-LE is an electrochemical sensor designed for precise measurement of formaldehyde (HCHO) within the range of 0–10 ppm. With ethanol cross-sensitivity suppressed to below 3%, it offers enhanced accuracy compared to conventional HCHO sensors. It also exhibits negligible cross-interference to ammonia, CO, and acetaldehyde. Featuring a signal output of 60 ± 20 nA/ppm and a high resolution of ≤0.01 ppm, the SS21F8-LE is optimized for high-sensitivity detection. It has a typical operating life of over 24 months in air and performs reliably in a temperature range of -10℃ to +40℃. This sensor is ideal for air purifiers, indoor air quality monitoring systems (IAQ), and portable detectors.

Performance Characteristics
Output Signal	60±20 nA / ppm
Typical Baseline Range (pure air, @ 20℃)	≤ ±0.03 ppm
Response Time (T90)	< 30 seconds
Filter	None
Measurement Range	0-10 ppm
Maximum Overload	20 ppm
Linearity	Linear
Repeatability	≤ ±3%
Recommended Load Resistor	10 ohms
Resolution (Electronics Dependent)	≤ 0.01 ppm typical
Bias Voltage	0 mV
Environmental
Temperature Range Continuous	-10℃ to +40℃
Pressure Range	800 to 1200 mbar
Operating Humidity Range	15% to 90% RH
Lifetime
Long Term Output Drift	< 10% per annum
Recommended Storage Temp	0℃ to 20℃
Expected Operating Life	> 24 months in air
Standard Warranty	24 months from date of dispatch
Intrinsic Safety Data
Maximum at 20 ppm	0.3 mA
Maximum o/c Voltage	< 1.0 V
Maximum s/c Current	< 0.1 A

You might also like