The FP-31 is a highly sensitive portable gas detector specific for formaldehyde detection. It uses a photoelectric photometry method which utilizes colorimetric tablets for detection. A tablet in placed into the instrument, and then a room air sample is pumped onto the tablet for either a 15 minute or a 30 minute period. If formaldehyde is present, it will cause the chemically impregnated tablet surface to darken or stain. The magnitude of the stain directly correlates to the level of formaldehyde in the air. The stain darkness is read by an optical sensor in the FP-31, and then the instrument calculates the formaldehyde concentration. The FP-31 then has a direct readout of the formaldehyde measurement on an easy to read LCD display. The unit is capable of detecting very low levels of formaldehyde, in order to confirm if an area contains safe breathing levels. There are no known interfering gases, as shown on the chart on the reverse side of this sheet.

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Quick Overview

Simple operation Built-in sample draw pump Easy to read LCD display Self-diagnosis Uses photoelectric photometry technology Direct digital readout Colorimetric detection tablet method No false readings from interfering gases Operates on 4 AA alkalines Stores 99 readings No warm up time

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Details

Detection gas	Formaldeyde (HCHO) in air
Detection range	0-0.4 ppm (0.005ppm/digit)	0-1.0 ppm (0.01 ppm/digit)
Detection time	30 minutes (1,800 sec.)	15 minutes (900 sec.)
Detection principle	Photoelectric photometry method
Detection method	Colorimetric tablet method (accumulating measurement)
Accuracy	± 10% of reading or ± 5% of full scale (which ever is greater)
Display	Digital LCD
Sampling method	Sample drawing with built-in pump
Operating conditions	-10 ~ 40ºC (14 ~ 104ºF), below 90%RH
Memory	Up to 99 readings (automatic recording at the completion of measurement)
Self-diagnosis	Failure of light source and light receiver, low battery voltage, pump failure, system trouble
Power Source	AA size Alkaline batteries (quantity 4)
Continuous Operation	Approximately 12 hours (with no alarm or backlight, with alkaline batteries at 20°C)
Dimension	Approx 85(W) x 190(H) x 40(D)mm, 3.35(W) x 7.48(H) x 1.57(W),
Weight	500g, 17.6 oz
Standard Accessories	• Detection TAB (20 pcs/pack) ** • Carrying case • AA size alkaline batteries • Operating manual
Optional Accessories	Zero and span tab, datalogging software, USB-IRdA cable (for downloading stored data)
Warranty	One year material and workmanship

Interference against other gases (typical)
Test Gas	Concentration	Reading
Toluene	1.0 vol.%	0 ppm
Benzene	1.0 vol.%	0 ppm
Acetoaldehyde	100 ppm	0 ppm
Carbon monoxide	50 ppm	0 ppm
Carbon dioxide	1.0 vol.%	0 ppm
Ammonia	25 ppm	0 ppm
Acetone	1.0 vol.%	0 ppm