Vaisala HM34 - Manual (Page 3)

1. PRODUCT DESCRIPTION
The HM34 is a battery-operated pocket-size meter for the meas-
urement of ambient relative humidity and temperature. The
humidity and temperature sensors are housed at the tip of an
extendable probe, where a semipermeable membrane filter
protects the humidity probe against water and dust. For easy use,
the meter features a HOLD function for the display and an
automatic power-off function.
For humidity measurement, the HM34 utilizes Vaisala's high-
accuracy, high-reliability HUMICAP
®
humidity sensor, the H-
sensor. Temperature measurement is based on a Pt 100 tempera-
ture sensor.
The meter is intended for ambient measurements in such appli-
cations as:
- spot checks
- industrial monitoring and inspections
- occupational health and safety
- laboratory and research use
The meter is available with the display calibrated for either
degrees Celsius (°C) or degrees Fahrenheit (°F).
1
HM34
Relative humidity and
temperature meter
USERS' MANUAL