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www.vaisala.com
HM70 Hand-Held Humidity and Temperature
Meter for Spot-Checking Applications
The Vaisala HUMICAP® Hand-Held Humidity and Temperature Meter HM70 is a highperformance, portable humidity reference that is exciting to use.
Features/Benefits
Multilingual user interface
▪
Shows measurement trends
▪
graphically
Proven Vaisala HUMICAP®
▪
Sensor technology
3 probe alternatives,
▪
temperature measurement
ranges between -70 and
+180 °C
Multiprobe operation; dew
▪
point and CO
be connected
2 probes can be connected
▪
simultaneously
Displays various humidity
▪
parameters
Sensor preheat and chemical
▪
purge options for demanding
conditions
NIST traceable (certificate
▪
included)
probes can also
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The Vaisala HUMICAP® Hand-Held
Humidity and Temperature Meter
HM70 is designed for demanding
humidity measurements in spotchecking applications. It is also ideal
for field checking and calibration of
Vaisala's fixed humidity instruments.
The HM70 incorporates the latest
generation of the Vaisala HUMICAP
Sensor. It is reliable and has better
than ever long-term stability.
Additionally, it has a sensor that
copes well with chemical interference
and provides accuracy that lasts in
demanding conditions.
The chemical purge option
maintains measurement accuracy
in environments with high
concentrations of chemicals. The
sensor preheat option reduces
measurement delays as it keeps
the sensor dry when the probe
is inserted into hot and humid
processes.
®
Three Probes
to Choose from
The HMP75 is a general purpose
probe whereas the HMP76 is a long,
stainless steel probe especially
suitable for spot-checking in ducts.
The HMP77 is a small probe at the
end of a 5-meter cable. The probe is
ideal for difficult-to-reach areas and
for on-site calibration of Vaisala's
process transmitters.
In addition, the HM70 supports the
use of Vaisala's dew point, carbon
dioxide and moisture in oil probes,
allowing measurements in several
multiparameter applications.
MI70 Link
The optional MI70 Link Windows®
software and the USB connection
cable form a practical tool for
transferring logged data and real
time measurement data from the
HM70 to a PC.
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Technical Data
HMP75, HMP76 and HMP77 Probes
Measured Variables
RELATIVE HUMIDITY
Measurement range 0 ... 100 %RH
Accuracy (including nonlinearity, hysteresis and repeatability)
at +15 ... +25 °C (+59 ... +77 °F) ±1 %RH (0 ... 90 %RH)
±1.7 %RH (90 ... 100 %RH)
at -20 ... +40 °C (-4 ... +104 °F) ±(1.0 + 0.008 x reading) %RH
at -40 ... +180 °C (-40 ... +356 °F) ±(1.5 + 0.015 x reading) %RH
Factory calibration ±0.6 %RH (0 ... 40 %RH)
uncertainty (+20 °C / +68 °F) ±1.0 %RH (40 ... 97 %RH)
(Defined as ±2 standard deviation limits.)
Response time (90%) at +20 °C (+68 °F) in still air
HMP75 (with standard plastic grid) 17 s
HMP76 (with standard sintered bronze filter) 60 s
HMP77 (with standard plastic grid and stainless
50 s
steel netting)
®
Sensor HUMICAP
®
HUMICAP
180RC (chemical purge, sensor preheat)
180R
Typical long-term stability better than 1 %RH / year
TEMPERATURE
Measurement range
HMP75 -20 ... +60 °C (-4 ... +140 °F)
HMP76 -50 ... +120 °C (-58 ... +248 F)
short time -50 ... +180 °C (-58 ... +356 °F)
HMP77 -70 ... +180 °C (-94 ... +356 °F)
Accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)
Accuracy over temperature range (see graph)
°C
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
0-80 -60 -40 -20 20 40 60 80 100 120 140 160
°C
180
Temperature sensor Pt100 RTD Class F0.1 IEC 60751
Probe General
Operating temperature range for electronics -40 ... +60 °C
(-40 ... +140 °F)
Housing classification IP65 (NEMA 4)
Housing material ABS/PC blend
Probe material Stainless steel (AISI316L)
Cable length between probe and indicator 1.9 m
MI70 Measurement Indicator
Indicator General
Menu languages English, Chinese, French, Spanish, German,
Russian, Japanese, Swedish, Finnish
Display LCD with backlight, graphic trend display of
any parameter, character height up to 16 mm
Max. no. of probes 2
Power supply Rechargeable NiMH battery pack with AC-
adapter or 4xAA-size alkalines, type IEC LR6 0
Analog output 0... 1 VDC
Output resolution 0.6 mV
PC interface MI70 Link software with USB or
serial port cable
Data logging capacity 2700 points
Alarm audible alarm function
Operating temperature range -10 ... +40 °C (+14 ... +104 °F)
Operating humidity range non-condensing
Housing classification IP54
Battery operation time
Continuous use 48 h typical at +20 °C (+68 F)
Data logging use up to a month, depending on logging
interval
Electromagnetic
compatibility
Complies with EMC standard
EN61326-1, Portable Equipment
MI70 Indicator + Probe = HM70
ACCESSORIES
Carrying cases
for MI70 and HMP75/77 probe MI70CASE
for MI70 and HMP75/76 probe MI70CASE2
Transmitter connection cables for
HMT330 & HMT120/130 211339
HMT310 DRW216050
HMW90 Series 219980
HMD/W60/70 Series HMA6070
MI70 Link software with USB cable 219687
MI70 Link software with serial port cable MI70LINK
Analog output cable 27168ZZ
Sensor protection HMP75
Plastic PC grid (HMP75 standard) 6221
Membrane filter 10159HM
Sintered bronze filter DRW212987SP
HMP76/77
Plastic PPS grid DRW010276SP
Sintered stainless steel filter
Sintered bronze filter (HMP76 standard) DRW212987SP
PPS grid with SS netting (HMP77 standard) DRW010281SP
HM47280SP
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Please contact us at
www.vaisala.com/requestinfo
Scan the code for
more information
Ref. B210435EN-D ©Vaisala 2012
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
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