EN
JA
M211982EN-E
Quick Guide
Vaisala Indigo Compatible
Humidity and Temperature Probes
HMP3, HMP4, HMP5, HMP7, HMP8, HMP9, MMP8, TMP1
PUBLISHED BY
Vaisala Oyj
Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
P.O. Box 26, FI-00421 Helsinki, Finland
+358 9 8949 1
Visit our Internet pages at www.vaisala.com.
© Vaisala Oyj 2019
No part of this document may be
reproduced, published or publicly
displayed in any form or by any means,
electronic or mechanical (including
photocopying), nor may its contents be
modified, translated, adapted, sold or
disclosed to a third party without prior
written permission of the copyright holder.
Translated documents and translated
portions of multilingual documents are
based on the original English versions. In
ambiguous cases, the English versions are
applicable, not the translations.
The contents of this document are subject
to change without prior notice.
Local rules and regulations may vary and
they shall take precedence over the
information contained in this document.
Vaisala makes no representations on this
document’s compliance with the local
rules and regulations applicable at any
given time, and hereby disclaims any and
all responsibilities related thereto.
This document does not create any legally
binding obligations for Vaisala towards
customers or end users. All legally binding
obligations and agreements are included
exclusively in the applicable supply
contract or the General Conditions of Sale
and General Conditions of Service of
Vaisala.
This product contains software developed
by Vaisala or third parties. Use of the
software is governed by license terms and
conditions included in the applicable
supply contract or, in the absence of
separate license terms and conditions, by
the General License Conditions of Vaisala
Group.
4 M211982EN-E
Table of Contents
Product Overview..............................................................................................6
Probe Structure............................................................................................................................ 6
Basic Features and Options......................................................................................................6
Output Parameters......................................................................................................................7
Installation...........................................................................................................8
HMP3 Probe........................................................................................................ 9
HMP4 Probe...................................................................................................... 10
HMP5 Probe........................................................................................................11
HMP7 Probe....................................................................................................... 12
HMP8 Probe.......................................................................................................13
Attaching Ball Valve Kit to Process....................................................................................... 14
HMP9 Probe.......................................................................................................16
Installing HMP9 Through a Cable Gland.............................................................................. 17
MMP8 Probe.......................................................................................................18
TMP1 Probe........................................................................................................ 19
Wiring................................................................................................................ 20
Attaching Probe to Indigo 200 Series Transmitter..................................21
Vaisala Insight Software.................................................................................22
Connecting to Insight Software.............................................................................................22
Modbus...............................................................................................................23
Default Communication Settings..........................................................................................23
Measurement Data Registers................................................................................................. 23
Configuration Registers...........................................................................................................25
Test Value Registers..................................................................................................................26
Technical Support............................................................................................27
More Information....................................................................................................................... 27
Warranty...................................................................................................................................... 27
Recycling......................................................................................................................................27
5
ENGLISH
Product Overview
HMP series probes are humidity and temperature measurement probes with a digital output
(Modbus protocol). The probes are designed for demanding humidity and temperature
measurement applications. The probes have a two-part structure, with measurement
electronics contained in the probe body and sensor(s) in the probe head. The probe body and
the probe head are connected by a cable. Length options for this connecting cable depend on
the probe model.
The probes are compatible with Vaisala Indigo transmitters. They can also be connected to
Vaisala Insight software for configuration, calibration, adjustment, diagnostics, and temporary
online monitoring.
Probe Structure
1
2
3
4
5
6
7
8
Figure 1 Probe Parts
1 Protection cap (remove before use)
2 5-pin M12 connector
3 Probe body with type label
4 Status indicator:
Green Power on and probe online,
flashes when communicating
Red Error
O Power o or indicator
disabled
5 Probe cable (do not cut)
6 Probe head (HMP7 model shown)
7 Location of sensor(s) on the probe
head. Most probe models have a
removable filter over the sensors that
can be replaced if it gets dirty or
damaged. Note that HMP9 and TMP1
do not have a removable filter.
8 Protection cap (remove before use)
Basic Features and Options
• Comprehensive list of output parameters. For example: relative humidity, temperature,
dew point temperature, wet-bulb temperature, absolute humidity, mixing ratio, water
vapor pressure, enthalpy. See Output Parameters (page 7).
• Sensor purge provides superior chemical resistance (HMP models only)
• Probe and sensor warming functions minimize condensation on probe (HMP models only)
• Traceable calibration certificate:
• HMP and MMP models: 6 points for humidity, 1 point for temperature
• TMP1: 2 points for temperature
• Standalone Modbus RTU over RS-485
• Compatible with Indigo series of transmitters
• Can be connected to Vaisala Insight PC software for configuration, calibration,
diagnostics, and temporary online monitoring
6 M211982EN-E
Output Parameters
On HMP probe models, the values of all available output parameters are always
locked when chemical purge or extra heat functions are heating the sensor.
Output parameter is available
Output parameter is available but its value is locked during sensor warming or probe
heating (HMP7 only) unless temperature is written to register 0334
hex
from an external
source
Output parameter is not available on this model
Table 1 Availability of Output Parameters
Output Parameter Output Unit HMP3, 4, 5,
7, 8, and 9
MMP8 TMP1
Relative humidity %RH
Temperature °C
Dew point temperature °C
Dew/frost point temperature °C
Dew/frost point temperature at 1 atm °C
Dew point temperature at 1 atm °C
Absolute humidity
g/m
3
Mixing ratio g/kg
Wet-bulb temperature °C
Water concentration ppm
v
Water vapor pressure hPa
Water vapor saturation pressure hPa
Enthalpy kJ/kg
Water activity -
Dew point temperature dierence °C
Absolute humidity at NTP
g/m
3
Water concentration in oil ppm
v
Relative saturation %RS
Water mass fraction ppm
w
7
ENGLISH
Installation
When you choose the installation location for the probe, consider the following:
• Verify the operating environment specification of the probe model. The probe head
typically has a much wider operating temperature range than the probe body.
• If the temperature of the measured environment diers greatly from ambient
temperature, the entire probe head and preferably plenty of cable must be inside the
measured environment. This prevents measurement inaccuracy caused by heat
conduction along the cable.
• Probe mounting options are model-specific.
1
2
3
4
Figure 2 Example Installation
1
Mount the probe head horizontally to prevent any water condensing on the probe head
from running to the sensors.
2 Let the cable hang loosely to prevent condensed water from running along the cable to
the probe head.
3 Attach the probe body to a wall or other surface using the two mounting clips (Vaisala
item 243257SP) supplied with the probe. Each clip attaches to the installation surface with
one screw (screw hole Ø 4.2 mm).
4 Cable to Modbus master or Indigo transmitter.
The supplied mounting clips are not designed to withstand strong
vibration. Use other methods to secure the probe body if necessary. For
example, attach the probe body using a cable tie.
CAUTION!
8 M211982EN-E
HMP3 Probe
136 [5.35]
Probe cable 2 m [6.56 ft]
Ø 25
[0.98]
M12/5
98.5 [3.88]
78.5 [3.09]
37.5 [1.48]
Ø 5
[0.2]
Ø 12
[0.47]
M9x1
mm
[in]
Figure 3 HMP3 Probe Dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP3 is a general purpose probe
designed for various industrial processes. The probe structure allows for replacing the sensor
without tools, making it suitable for applications such as paint booths and other industrial
applications where periodic recalibration alone is not sucient for maintaining the probe
performance. Other suitable applications include, for example, industrial HVAC systems,
cleanrooms, and environmental chambers.
• Operating temperature for probe head −40 … +120 °C (−40 … +248 °F)
• Operating temperature for probe body −40 … +80 °C (−40 … +176 °F)
If purchased with a composite sensor instead of the field replaceable HUMICAPâ R2 sensor,
HMP3 can use the chemical purge feature. In environments with high concentrations of
chemicals and cleaning agents, the chemical purge option helps to maintain measurement
accuracy between calibration intervals.
9
ENGLISH
HMP4 Probe
136 [5.35]
Probe cable 2 m [6.56 ft]
Ø 25
[0.98]
M12/5
183 [7.20]
120 [4.72]
41 [1.61]
Ø 5
[0.2]
Fitting body NPT1/2” or M22×1.5
with sealing ring Ø22×27×1.5 Cu
Ø 12
[0.47]
32 mm 27 mm
mm
[in]
Figure 4 HMP4 Probe Dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP4 is designed for high-pressure
applications such as compressed air systems in maritime, breathing air, and industrial
applications, where measurement performance and chemical tolerance are essential.
• Temperature measurement range −70 … +180 °C (−94 … +356 °F)
• Operating pressure 0 … 10 MPa (0 … 100 bar)
• Operating temperature for probe body −40 … +80 °C (−40 … +176 °F)
• M22×1.5 or NPT1/2” fitting body
Use a sealing ring (Ø22×27×1.5 Cu) with the M22×1.5 fitting. Replace the sealing
ring every time the probe is detached. Three sealing rings are supplied with the
fitting.
10 M211982EN-E
HMP5 Probe
136 [5.35]
Ø 25
[0.98]
M12/5
41 [1.61]
253 [9.96]
243 [9.57]
Ø 12
[0.47]
Ø 13.5
[0.53]
Probe cable
2 m [6.56 ft] or 10 m [32.8 ft]
Ø 5
[0.2]
mm
[in]
Figure 5 HMP5 Probe Dimensions
mm
[in]
75 [2.95]
50 [1.96] 19 [0.75]
Figure 6 Optional Mounting Flange 210696 Dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP5 is designed for high-temperature
applications such as baking ovens, pasta dryers, and industrial drying kilns, where
measurement performance and chemical tolerance are essential.
• Temperature measurement range −70 … +180 °C (−94 … +356 °F)
• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
• 250-mm (9.84 in) probe allows easy process installation through insulation
11
ENGLISH
HMP7 Probe
mm
[in]
136 [5.35]
Ø 25
[0.98]
M12/5
Ø 12
[0.47]
99.5 [3.92]
79.5 [3.13]
37.5 [1.48]
Groove for
lock ring
Ø 12
[0.47]
Ø 5
[0.2]
Probe cable
2 m [6.56 ft] or 10 m [32.8 ft]
Figure 7 HMP7 Probe Dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP7 is designed for applications that
involve constant high humidity or rapid changes in humidity, such as drying and test
chambers, combustion air, and other humidifiers and meteorological measurements, where
measurement performance and chemical tolerance are essential.
• Temperature measurement range −70 … +180 °C (−94 … +356 °F)
• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
• Probe heating and sensor warming functions minimize condensation on probe
• Vapor and pressure proof construction
Probe Heating
HMP7 supports probe heating. Probe heating heats up not only the sensor, but the entire
probe head. When probe temperature is heated above dew point temperature, condensation
on the probe can be avoided while measuring the dew point temperature of the process.
If probe heating is enabled, output parameters that are dependent on temperature
measurement (such as relative humidity) are locked whenever probe is heated unless the true
temperature of the measured environment is updated to the temperature compensation
register of the probe from another measurement instrument (for example, the TMP1 probe).
Output parameters such as dew point temperature that can be measured or calculated
without this external temperature information are available even without the temperature
input.
12 M211982EN-E
HMP8 Probe
136 [5.35]
Probe cable 2 m [6.56 ft]
Ø 25
[0.98]
M12/5
Ø 12
[0.47]
41 [1.61]
Ø 13.5
[0.53]
Fitting body
ISO1/2” or NPT1/2”
Ø 5
[0.2]
mm
[in]
268 [10.55]
230 [9.06]
41 ... 185 [1.16 ... 7.28]
Figure 8 HMP8 Probe Dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP8 is designed for pressurized
applications in compressed air systems, refrigerant dryers, and other pressurized industrial
applications, where easy insertion and removal of the probe and adjustable installation depth
into the pipeline are needed.
• Temperature measurement range −70 … +180 °C (−94 … +356 °F)
• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
• Operating pressure 0 … 4 MPa (0 … 40 bar)
• Probe installation depth can be freely adjusted and probe can be hot-swapped from
pressurized pipelines with an installation valve
• ISO1/2" or NPT1/2" fitting body
13
ENGLISH
Attaching Ball Valve Kit to Process
G1/2
ISO 228/1
Ø21.5 (drilling)
Ø14
Ø14
Ø14
2
3
4
5
1
1 Ball valve handle: must point to the same direction as the ball valve body when installing.
2 Extension nipple, threads G1/2 ISO228/1 and R1/2 ISO7/1.
3 Ball valve body. When tightening the assembly, turn only from the ball valve body.
4 Ball of the ball valve.
5 Welding joint, threads R1/2 ISO7/1.
1. Attach the welding joint to the process pipe or chamber.
2. Apply a sealant (MEGA-PIPE EXTRA No 7188 or LOCTITEâ No 542 +activ. No 7649) on
the threads of the welding joint and screw the bottom of the ball valve onto the welding
joint.
14 M211982EN-E
3. Tighten the ball valve assembly by turning from the ball valve body.
Tightening the ball valve kit by turning the extension nipple
can break the sealing. Tighten the ball valve assembly only from the ball
valve body.
CAUTION!
4. If you need to cap the ball valve assembly before installing or after removing the probe,
attach a blanking nut to close the top of the valve.
15
ENGLISH
HMP9 Probe
mm
[in]
112 [4.41]
Probe cable 2 m [6.56 ft]
Ø 25
[0.98]
M12/5
94 [3.70]
Ø 2.4
[0.094]
Ø 5
[0.20]
16 [0.63]Attachment
point
Figure 9 HMP9 Probe Dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP9 is designed for easy installation
into rapidly changing environments where fast response time, measurement performance, and
chemical tolerance are essential.
The probe head can be mounted through thin metal walls using the included cable gland or
mounting grommet. Two grommets are included: small one for 6.5 mm diameter hole, and
large one for 12.5 mm diameter hole.
You can also attach the probe head directly using a zip tie. The probe head should be attached
from the point near the black plastic part.
• Temperature measurement range −40 … +120 °C (−40 … +248 °F)
• Operating temperature of probe body −40 … +60 °C (−40 … +140 °F)
• Integrated filter (non-replaceable)
Do not damage the probe head by bending, crushing, or striking it.
Avoid overtightening when installing the probe head through a cable gland.
CAUTION!
16 M211982EN-E
Installing HMP9 Through a Cable Gland
1 2 3
4
Figure 10 Installing HMP9 Probe Head Through a Cable Gland
1 Black plastic part of the HMP9 probe head
2 Nut for tightening the probe in place
3 Base of the cable gland
4 M10×1.5 threads of the cable gland
• M10×1.5 cable gland (included with HMP9 probe)
• Drill with 8.5 mm bit
• M10×1.5 threading tap
• 13 mm wrench
1. Drill a 8.5 mm diameter hole in the installation location.
2. Use a threading tap to create a M10×1.5 thread in the hole.
3. Install the base of the cable gland in the hole and tighten with a 13 mm wrench.
4. Insert the seal of the cable gland in the base and place the nut of the cable gland over the
probe head.
5. Insert the probe head in the cable gland up to the black plastic part of the probe head.
Leave the black plastic part entirely outside the cable gland. Tighten the cable gland to
finger tightness.
6. Tighten the nut of the cable gland with a 13 mm wrench until the probe head stops
moving. Do not overtighten.
17
ENGLISH
MMP8 Probe
136 [5.35]
Probe cable 2 m [6.56 ft]
Ø 25
[0.98]
M12/5
Ø 5
[0.2]
mm
[in]
262 [10.32]
224 [8.82]
35 ... 179 [1.37 ... 7.05]
35 [1.37]
Ø 13.5
[0.53]
Fitting body
ISO1/2” or NPT1/2”
Ø 12
[0.47]
Figure 11 MMP8 Dimensions
Vaisala HUMICAPâ Moisture in Oil Probe MMP8 enables fast and reliable measurement of
moisture in oil. It uses proven Vaisala HUMICAPâ sensor that was developed for demanding
dissolved moisture measurements in transformer and lubrication oils, hydraulic fluids, and
other liquids.
MMP8 measures dissolved moisture in oil in terms of the water activity (a
w
), relative saturation
(%RS), and temperature (T). Water activity or relative saturation indicate directly whether
there is a risk of free water formation. This data is relevant in lubrication oil applications where
detecting water ingress and preventing free water formation is crucial. The measurement is
independent of oil type and age.
MMP8 can also output ppm, the average mass concentration of water in oil. Vaisala has this
conversion readily available for specific oils, including mineral transformer oil. This allows
continuous measurement of ppm concentration in power transformer condition monitoring.
• Temperature measurement range −40 … +180 °C (−40 … +356 °F)
When installed with the ball valve kit, the MMP8 is ideal for installation into processes where
the probe needs to be installed or removed while the process is running. Probe installation
depth is adjustable. Pressure fitting options are ISO 1/2" and NPT 1/2". MMP8 is delivered with
a manual pressing handle that allows the probe to be pushed against process pressure.
For installation instructions of the ball valve see Attaching Ball Valve Kit to Process (page 14).
18 M211982EN-E
TMP1 Probe
130 [5.12]
Ø 6
[0.24]
136 [5.35]
Ø 25
[0.98]
M12/5
Ø 3.2
[0.13]
mm
[in]
Probe cable
2 m [6.56 ft] or 10 m [32.8 ft]
Figure 12 TMP1 Probe Dimensions
Vaisala Temperature Probe TMP1 is designed for demanding temperature measurements in
industrial applications such as pharmaceutical industry and calibration laboratories, where
accuracy and robustness are essential.
• Temperature measurement range −70 … +180 °C (−94 … +356 °F)
• Operating temperature of probe body −40 … +80 °C (−40 … +176 °F)
19
ENGLISH
Wiring
1
5
3
4
2
Figure 13 M12 5-pin A-coded Male Connector Pinout
Pin # Function Notes Wire Colors in Vaisala
Cables
1 Power supply Operating voltage:
• HMP7: 18 ... 30 VDC
• Other models: 15 ... 30 VDC
Current consumption: 10 mA typical,
500 mA max.
Brown
2 RS-485 - White
3 Power GND and
RS-485 common
Blue
4 RS-485 + Black
5 Not connected Gray
RS-485 host
DC power supply
RS-485 +
RS-485 -
RS-485 common
+
-
Pin #1
Power supply
Pin #2
RS-485 -
Pin #3
Power GND
RS-485 common
Pin #4
RS-485 +
Pin #5
Probe
Figure 14 RS-485 Wiring
Recommended maximum length of the RS-485 line is 30 m (98 ft).
20 M211982EN-E
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