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.
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
|
Field Test Verification Data |
| Measurement Place |
FP-31 |
DNPH method*
|
| Interior |
0.020 ppm |
0.025 ppm
|
| Locker |
0.030 ppm |
0.03 ppm
|
| Furniture |
0.040 ppm |
0.05 ppm
|
* Dinitrophenylhydrazine detection method
** Please note: Detection tabs have a six month shelf life. They must be stored in a referigerator (37°F - 50°F, 3-10°C)
Specifications subject to change without notice.
Additional Information
Manufacturer: RKI Instruments