A tablet is 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.

Features
• 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 alkaline
• Stores 99 readings
• No warm up time

Applications
• Furniture and woodworking
• Coating and varnishing
• Engineered wood products
• Medical / veterinary
• Painting & corrosion resistant finishes
• Carpet manufacture & storage
• Adhesives
• Heat treatment operations
• RV/Trailer/mobil home inspecting

Detection Ranges
30 minute sample 0 - 0.4 ppm (0.005 ppm/digit)
15 minute sample 0 - 1.0 ppm (0.01 ppm/digit)