The HHAQ-108 is ideal for
measuring levels of gaseous
formaldehyde (HCHO) as part
of a workplace indoor air quality
(IAQ) maintenance program,
or to spot-check a residential
The HHAQ-108 features an
electrochemical sensor which
measures real-time formaldehyde
gas concentration with accuracy
and resolution that meet U.S.
National Institute for Occupational
Safety and Health’s (NIOSH’s)
acceptance criteria. It also tracks,
calculates and displays three
cumulative formaldehyde gas
metrics: 8-hour TWA
(time-weighted average), 1-hour
average, and 15-minute STEL
(short-term exposure limit). The
device is also equipped with a
tripod mount fitting for hands
Specifications Formaldehyde Range/Resolution: 0 to 5 ppm/0.01 ppm* Formaldehyde Accuracy: ±(5% + 0.03 ppm)* Formaldehyde Sensor Type Warmup Time: Electrochemical/1 to 15 minutes Temperature Range: 0 to 50°C (0 to 122°F) Temperature Accuracy/Resolution: ±1°C (1.8°F)/0.1° RH Range/Accuracy: 10 to 90% RH/±5% of reading, typical Display Type/Size: Dual readout LCD/51 mm (2") diagonal Auto Power-Off Trigger: 15 minutes of front-panel inactivity (can be disabled) Operating Temperature: 0 to 50°C (32 to 122°F) @ 0 to 95% RH, non-condensing Dimensions: 210 L x 60 H x 25 mm D (8.3 x 2.4 x 1.0") Weight: 204 g (7.2 oz) (with battery) Power Source: 4 “AAA” batteries (included) or optional 110V AC adaptor (HHB400-AC) * Meets U.S. National Institute for Occupational Safety and Health’s (NIOSH’s) acceptance criteria.
† All amounts shown in USD Note: Comes complete with soft pouch, 4 “AAA” batteries and operator’s manual.
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