Vaisala HMI41
P.O. Box 26, FI-00421 Helsinki, FINLAND
Tel: +358 9 894 91
Fax: +358 9 8949 2485
Email: [email protected]
www.vaisala.com/HMI41
HMP41, HMP42 and HMP45 Probes
for HMI41 Indicator
Features/Benefits
• Humidity measurement range 0 ... 100 %RH
• Temperature measurement range
The HMI41 indicator with the HMP41
probe.
HMI41 with the HMP42 probe.
HMP41, HMP45: -20 ... +60 °C
(-4 ... +140 °F)
HMP42: -40 ... +100 °C (-40 ... 212 °F)
• For spot checking measurements
• Versatile and easy-to-use
• The HMI41 Indicator fits with all probes
• Extremely thin 4 mm probe head (HMP42)
• Incorporates Vaisala HUMICAP®
Sensor, which provides high accuracy, excellent long-term stability, neglible hysteresis, and insensitivity to dust and most chemicals
• NIST traceable (certificate included)
Vaisala HUMICAP® Humidity Indicator
HMI41 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 HMI41 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.
Ideal for spot checking
applications
Vaisala HUMICAP®
Humidity
and Temperature Probe
HMP41:
This probe is fix-mounted directly
on the HMI41 indicator. It can be
upgraded to an HMP45 by purchasing
the HMH45 handle and cable option.
Vaisala HUMICAP®
Humidity
and Temperature Probe
HMP42:
The HMP42 probe can be used for spot
checking humidity and temperature
in applications which require an
extremely 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 4 mm,
allowing access into very small, tight,
and hard-to-reach spaces.
Vaisala HUMICAP®
Humidity
and Temperature Probe
HMP45:
This probe for general purposes
features an extended spiral cable.
Vaisala HUMICAP®
Humidity
and Temperature Probe
HMP46:
See preceding data sheet.
The HMI41 indicator with probes
is ideal for use in a variety of spot
checking applications such as plant
maintenance, air-conditioning system
installation and inspection, freezers
and storage and production areas.
HMI41 with the HMP45 probe.
38
Vaisala Instruments Catalog 2008
Ref. B210712en rev. A
HMP41, HMP42, HMP45
HUMIDITY
DEWPOINT
Technical Data
HMP41, HMP42, and HMP45 probes
Humidity
Measurement range
Accuracy at +20 °C (+68 °F)
when calibrated against
salt solutions (ASTM E014-85)
Temperature dependence of
electronics Typical long-term stability
Response time (90%) at +20 °C
in still air
Sensor HMP41 & 45
Sensor HMP42
Accessories
Serial interface cable
Carrying case for HMI41 and HMP41/45
Aluminum case for HMP41/42/45/46
Rigid plastic case for HMP41/42/45/46
HMP42
Calibration adapter
Rubber sleeve set
0 ... 100 %RH
±2 %RH (0 ... 90 %RH)
±3 %RH (90 ... 100 %RH)
±0.05 %RH/°C
better than 1 %RH per year
HMP41, HMP42 and HMP45
HM37067
19809HM
Dimensions
Dimensions in mm.
(HMP41, HMP45) 15 s
(HMP42) 30 s
HUMICAP® 180
HUMICAP® MINI
Temperature
Measurement range probe
HMP41, HMP45 -20 ... +60 °C (-4 ... 140 °F)
HMP42
-40 ... +100 °C (-40 ... +212 °F)
Temperature accuracy over measurement range
Sensor (HMP41 & 45)
PT 1000 IEC 751 1/3 class B
(HMP 42)
PT 100 IEC 751 class B
HMP42
only
19446ZZ
HM36736
MI70CASE2
210614
HMI41
HMP41
HMP42
HMP45
HMP42 only
30
30
38
88
118
Ø 18.5
Ø 18.5
General
Typical ranges of calculated variables
dewpoint temperature
-20 ... +60 °C (-4 ... +140 °F)
absolute humidity
0 ... 160 g/m3
wet bulb temperature
0 ... +60 °C (32 ... 140 °F)
mixing ratio
0 ... 160 g/Kg d.a.
The accuracies of these calculated variables are limited by the accuracies of the measured variables on which they are based, namely
RH and T. The RH and T accuracies are stated above under Measured Variables.
Cable length (HMP42 & 45)
1500 mm; extended spiral cable
Operating temperature range
HMP41
-20 ... +60 °C (-4 ... +140°F)
HMP42
-40 ... +100 °C (-40 ... +212 °F)
HMP45
-40 ... +60 °C (-40 ... +140 °F)
Battery operation time (alkaline batteries)
72 h continuous use
Housing material
ABS plastic
Housing classification, electronics
IP65 (NEMA 4)
Sensor protection
HMP41 & 45
plastic grid HM46717
option membrane filter
2787HM
HMP42
steel grid
19867HM
membrane tube set (5pcs)
19858HM
Weight
HMP41
30 g
HMP42
200 g
HMP45
160 g
Electromagnetic compatibility
Complies with EMC standard EN61326-1, Portable Equipment.
Vaisala Instruments Catalog 2008
Ref. B210712en rev. A
237
318
MODE
HOLD
ENTER
Ø 21
13
ON/OFF
MIN/MAX
106
200
125
75
80
3 7
HUMICAP® is a registered trademark of Vaisala.
Specifications subject to change without prior notice.
© Vaisala Oyj
39
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