Overview of the portable formaldehyde gas detector:

The portable formaldehyde gas detector model FP-31 is a precision gas analyser which measures gases in the ppm range using photoelectric photometry method with chlorimetric detection tabs. This device is a highly sensitive portable instrument with 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.

Inbuilt Micro Processor

The inbuilt micro processor controlled sample pump of the FP-31 draws the sample over the tab giving you a direct digital readout. The inbuilt data logger will store up to 99 readings that can be viewed on the display or downloaded on to a PC. The FP-31 is designed to monitor formaldehyde below the World Health Organisation level of 0.08ppm (based on an average reading over 30 minutes with a resolution of 0.005ppm). There are two ranges available for this model.

Detection

The portable formaldehyde gas detector FP-31 uses a photoelectric photometry method which utilises 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 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 portable formaldehyde gas detector model FP-31, and then the instrument calculates the formaldehyde concentration. The portable formaldehyde gas detector model 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.

Specifications of the portable formaldehyde gas detector:

Detection gas	Formaldehyde (HCHO) in air
Detection range	TAB No.008 0‐0.4 ppm	Tab No.009 0‐1.00 ppm
Detection Time	30 min. (1,800 sec)	15 min. (900 sec)
Resolution	0‐005 ppm	0.01 ppm
Detection principle	Photoelectric Photometry method
Detection method	Colorimetric tablet method (Accumulating measurement)
Display	Digital LCD
Sampling method	Sample drawing with built‐in pump
Operating conditions	‐10°C +40°C, below 90%RH (non‐condensing)
Memory	Detection point: Up to 99 points (automatic recording at completion of measurement)
Self‐Diagnosis	Sensor failure, Pump failure, Battery error, System failure
Power Source	AA size Alkaline batteries (4pcs)
Continuous operating time	Approx 12 hours (with no alarm or backlight, with alkaline battery at 20°C)
Dimensions	Approx 8cm (W) x 15cm (H) x 4cm (D)
Weight	Approx 250g without dry‐cell battery
Standard Accessories	Detection TAB (20 pcs/pack) Detection TAB (20 pcs/pack) AA size Alkaline batteries Attachment for tripod stand Operating Manual Inspection certificate
Optional Accessories	Data logger software Filter

 

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

Downloads for the portable formaldehyde gas detector:

Specifications:

• FP-31 Datasheet