John Jones of PPM "We will supply 120 of our hand-held instruments for detection of formaldehyde in the air - the Formaldemeter
The HCHO and C[O.sub.2] in the air stream were analyzed by an HCHO monitor (Formaldemeter
400, PPM Technology) and a C[O.sub.2] monitor (HAL-HC[O.sub.2]01, Chinaway), respectively.
Measurement of formaldehyde concentrations used a Formaldemeter
400 (PPM Technology, Caernarfon, Wales, UK) with a detection range of 0-10 ppm (0-37.85 gal/L), a detection limit of 0.01 ppm (0.0378 gal/L), and a precision of 10% at 2 ppm (7.57 gal/L).
htV portable formaldehyde monitor from Enmet, Ann Arbor, Mich., uses humidity compensation for improved accuracy at low concentrations and when taking readings in different environments.