HMP4 Relative Humidity and Temperature Probe

HMP4 Relative Humidity and
Temperature Probe
For High Pressures
Features
• RH accuracy up to 0.8 %RH
• Temperature accuracy up to 0.1 °C
(0.18 °F)
• Temperature measurement range
-70 ... +180 °C (-94 ... +356 °F)
• Operating pressure 0 ... 10 MPa
(0 ... 100 bar)
• Sensor purge provides superior
chemical resistance
• Modbus RTU over RS-485
• Plug & play compatible with
Indigo™ series of transmitters
• Traceable calibration certificate: 5
points for humidity, 1 point for
temperature
Vaisala HUMICAPâ Humidity and Temperature Probe HMP4 is designed for highpressure applications such as compressed air systems in maritime, breathing air, and
industrial applications, where measurement performance and chemical tolerance are
essential.
Proven Vaisala HUMICAPâ
Performance
Vaisala is the original innovator of the
thin-film capacitive humidity
measurement technology, which has now
become the industry standard in
humidity measurement.
HUMICAPâ technology results from
Vaisala's 40-year experience in industrial
humidity measurement, providing the
best stability, fast response time, and low
hysteresis in a wide range of
applications.
Chemical Purge Minimizes
Effects of Contaminants
In environments with high
concentrations of chemicals and cleaning
agents, the chemical purge option helps
to maintain measurement accuracy
between calibration intervals.
The chemical purge involves heating the
sensor to remove harmful chemicals. The
function can be initiated manually or
programmed to occur at set intervals.
Flexible Connectivity
The probe is plug and play compatible
with Vaisala Indigo™ series of
transmitters, or it can be used as a
standalone digital Modbus RTU
transmitter over RS-485 serial bus. For
easy-to-use access to field calibration,
device analytics, and configuration
functionality, the probe can be
connected to Vaisala Insight™ Software
(see www.vaisala.com/insight).
Vaisala Indigo™ Product Family
Indigo transmitters offer a variety of
connectivity options through analog
signals or digital outputs, configurable
relays, and wireless (WLAN)
configuration interface, providing a
suitable solution for all industrial
humidity measurements. The cable
length between the probe and
transmitter can be extended to up to 30
meters. For more information, see
www.vaisala.com/indigo.
Services You Can Count On
Each probe is manufactured and
individually calibrated in Vaisala's worldclass facility in Finland. The traceable
factory calibration certificate is included
also in electronic format in the probe.
The interchangeable probes minimize
the downtime associated with
maintenance. Validate and maintain the
accuracy by calibrating the instrument
on the field or use the easy and thorough
calibration service in Vaisala's service
facilities in Helsinki, Boston, Beijing and
Tokyo.
Technical Data
Inputs and Outputs
Measurement Performance
Operating voltage
15 ... 30 VDC
Current consumption
10 mA typical
500 mA max.
±0.8 %RH (0 ... 90 %RH)
Digital output
RS-485, non-isolated
15 s
Default serial settings
19200 bps N 8 2
Protocols
Modbus RTU
Relative Humidity
Sensor
HUMICAP R2 Composite
Measurement range
0 ... 100 %RH
Accuracy at +23 °C (+73.4 °F) 1)
T63 response time
Temperature
Sensor
Pt100 RTD Class F0.1 IEC 60751
Measurement range
-70 ... +180 °C (-94 ... +356 °F)
Accuracy at +23 °C (+73.4 °F)
1)
Output Parameters
Relative humidity, temperature, dew point temperature, wet-bulb temperature,
absolute humidity, mixing ratio, water concentration, water mass fraction, water
vapor pressure, enthalpy
±0.1 °C (±0.18 °F)
1)
Defined against calibration reference
Mechanical Specifications
4.0
3.5
90
3.0
...
10
0
2.0
%
R
M22x1.5 and NPT1/2” fittings included
Connector
M12/5
Weight
530 g (18.7 oz)
Materials
H
1.5
1.0
Probe
AISI316
Probe body
AISI316
Cable jacket
FEP
0.5
0 ... 90 %RH
136 [5.35]
170
Probe cable
2000 [78.74]
180
150
160
130
140
110
120
90
100
70
80
50
60
40
20
Temperature
30
0
10
-10
-20
-30
0.0
-40
Accuracy [+/- % RH]
2.5
Probe fitting
[ °C]
0.4
M12/5
0.3
Probe Body Dimensions
0.2
mm
[in]
183 [7.20]
120 [4.72]
0.1
41 [1.61]
170
180
150
160
140
120
130
110
100
80
90
70
60
50
40
20
30
0
10
-10
-20
-30
-40
-50
-70
0
-60
Accuracy [+/- °C]
0.5
Ø 25
[0.98]
HMP4 Humidity Measurement Accuracy as a Function of Temperature (Including
Non-Linearity and Repeatability)
HMP4 Temperature Measurement Accuracy over Full Range (Including NonLinearity and Repeatability)
mm
[in]
32 mm 27 mm
HMP4 Probe Head Dimensions
SI Traceable Calibration
Uncertainty of relative humidity
calibration (k = 2)
±0.5 %RH (0 ... 40 %RH)
±0.8 %RH (40 ... 95 %RH)
Uncertainty of temperature calibration
(k = 2)
±0.1 °C (±0.18 °F) at +23 °C (+73.4 °F)
Operating Environment
Operating temperature range for probe -40 ... +80 °C (-40 ... +176 °F)
body
Operating temperature range for probe -70 ... +180 °C (-94 ... +356 °F)
head
Operating environment
Suitable for outdoor use
IP rating
IP66
Electromagnetic compatibility
Complies with EMC standard
EN61326-1, Electrical equipment for
measurement, control and laboratory
use - EMC requirements - Industrial
environment
Operational pressure
< 100 bar
Fitting body
M22x1.5 or NPT1/2”
Ø 12
[0.47]
Temperature [ °C]
Accessories
Transmitters
Indigo 200 Series
See order form
Connection Cables
Connection cable to Indigo (1 m)
INDIGOCABLE1M
Connection cable to Indigo (3 m)
INDIGOCABLE3M
Connection cable to Indigo (5 m)
INDIGOCABLE5M
Connection cable to Indigo (10 m)
INDIGOCABLE10M
Open wires 1.5 m
223263SP
Open wires 10 m
216546SP
Open wires and 90° plug
244669SP
Flat cable 1 m M12/5
CBL210493SP
USB PC connection cable 1)
242659
Filters
Sintered stainless steel filter 2)
HM47280SP
Stainless steel grid
HM47453SP
Metallized PPS plastic grid with
stainless steel mesh filter
DRW010281SP
Metallized PPS plastic grid filter
DRW010276SP
1)
2)
Vaisala Insight software for Windows available at www.vaisala.com/insight
Standard in delivery
Published by Vaisala | B211682EN-A © Vaisala 2017
www.vaisala.com
All rights reserved. Any logos and/or product names are trademarks of
Vaisala or its individual partners. Any reproduction, transfer, distribution
or storage of information contained in this document is strictly
prohibited. All specifications — technical included — are subject to
change without notice.
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