Currently, measurements for concentration of formaldehyde is done most commonly by absorptiometric method or HPLC (high performance liquid chromatography) method.
However, these methods require expensive devices, knowledge and experience.
Furthermore, in detector tube method which is effective as a simple measurement, up to this date it had been impossible to detect and measure the trace amount of formaldehyde at the indoor pollution level.
With Air sampler S-21, this newly developed detector tube is capable of measuring within the range of 0.01 - 1.2ppm. And it covers the indoor environment suggested value by WHO, which is 0.1mg/m3 (0.08ppm 30min average).





SPECIFICATIONS

Model Number	Air sampler S-21
Sampling pump	diaphram
Maximum suction pressure	more than 400hPa (At full load)
Flow rate settings range	50 - 500mL/min
Flow Meter Accuracy	±5% of full scale
Repeatability of Flow Meter	±1% of indicated value
Timer function	1min?99hrs.59min. with Digital setting (addition display)  *It is set to stop after 30 minutes with the shipment settings  　　　　　　display; subtraction display
Operating temperature range	orange to red-purple
Power source	0 - 40℃
Dimensions	125(W) x 146(H) x 220(D)mm
Weight	2.5kg
Option	Position pole to keep measuring height, Tip cutter : B191 and Thermometer