Specifications

19
VERSATILE AND EASY TO USE
Vaisala's HMI 41 hand-held indicator can be used
with any one of the four probes to quickly and easily
measure humidity and temperature, and to make
other measurement calculations such as dewpoint,
wet bulb temperature, absolute humidity, and mixing
ratio.
The HMI 41 has an easy-to-read LCD display.
Temperature readout is available in either degrees
Centigrade or Fahrenheit. Calculated variables are
available in metric and non-metric.
The HMI 41 with probes is ideal for use in a variety
of spot checking applications such as plant mainte-
nance; air-conditioning system installation and
inspection: freezers; and storage and production
areas.
HIGH PERFORMANCE SENSOR
Vaisala probes incorporate the HUMICAP
®
humidity
sensor, known for its high accuracy, reliability, and
long-term stability. For more than twenty-five years,
this rugged sensor has proven itself time and time
again to be resistant to dust and most chemicals.
HMP 41: This humidity and temperature probe is
fix-mounted directly on the HMI 41 indicator. It can
be upgraded to an HMP 45 by purchasing the HMH
45 handle and cable option.
HMP 45: This humidity and temperature probe
features an extended spiral cable.
HMP 42: The HMP 42 humidity and temperature
probe can be used for spot checking humidity and
temperature in applications which require an ex-
tremely thin probe, such as:
- for monitoring the drying of structures during
construction or after water damage
- in tight places
- in ducts or chambers
- under a linoleum floor
The probe diameter is only 0.16 inch. (4 mm),
allowing access into very small tight, and hard-to-
reach spaces.
HMP 46: See preceding data sheet.
HMI 41 with HMP 45
HMI 41 with HMP 42
Humidity and Temperature Probes
for the HMI 41 Indicator
NEW
HMI 41 with HMP 41