RH Accuracy / Resolution: ±5% of reading / 0.1%RH
Display Type / Size: Dual readout LCD / 2 in. (51mm) diagonal
Auto Power Off Trigger: 15 minutes of front-panel inactivity
(can be disabled)
Operating Temperature: 32° to 122°F (0° to 50°C) @
0 to 95%RH, non-condensing
Dimensions: 8.3 x 2.4 x 1.0 in. (210 x 60 x 25mm)
Weight: 7.2 oz. (204g), including batteries
Power Source: (4) “AAA” batteries (not included) or included
110VAC adaptor
* Meets U.S. National Institute for Occupational Safety and
Health's (NIOSH's) acceptance criterion within ±25% of true
value at 95% confidence level
OPERATING & MAINTENANCE TIPS
When the low battery indicator appears in the upper right
corner of the LCD, install fresh batteries immediately,
following the instructions on pages 9 and 10 of this manual.
Be aware that measurements remain valid even though the
batteries have grown weak.
The electrochemical formaldehyde sensor is as power-hungry
as it is accurate and sensitive. OMEGA recommends using
the included 110VAC adaptor if you plan to routinely conduct
measurement sessions lasting more than 15 minutes. The
AC adaptor can also provide a worry-free way to keep the
HHAQ-108 powered long enough to calculate and display the
three cumulative formaldehyde exposure metrics.
Remove the batteries if you don’t expect to use the HHAQ-108
for an extended period of time (months or years).
The meter uses a capacitive RH sensor and a thermistor
temperature sensor whose accuracy may drift over time. If you
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