Vaisala Oyj
Street address: Vanha Nurmijärventie 21, FI-01670 Vantaa, Finland
Mailing address: P.O. Box 26, FI-00421 Helsinki, Finland
Phone:+358 9 8949 1
Visit our Internet pages at www.vaisala.com.
No part of this manual 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
manuals 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 manual are
subject to change without prior
notice.
Local rules and regulations may
vary and they shall take
precedence over the information
contained in this manual. Vaisala
makes no representations on this
manual’s compliance with the
local rules and regulations
applicable at any given time, and
hereby disclaims any and all
responsibilities related thereto.
This manual 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.
HMP4, HMP5, HMP7, and HMP8 are humidity and temperature measurement probes with a
digital (Modbus) output. TMP1 is a temperature-only version. The probes are designed for
demanding humidity and temperature measurement applications. Each probe model has a
dierent probe head, but the same probe body and a 2 m (6.5 ft) cable between the probe
body and the probe head.
The probes are compatible with Vaisala Indigo™ transmitters. They can also be connected to
Vaisala Insight software for
configuration, diagnostics, and temporary online monitoring.
Probe Structure
Figure 1 Probe Parts
1Protection cap (remove before use)
25-pin M12 connector
3Probe body with type label
4Status indicator:
GreenPower on and probe online,
RedError
OPower o or indicator
5Probe cable. Do not cut.
6Probe head (HMP7 model shown)
7Sensor(s) under protective filter
8Protection cap (remove before use)
flashes when communicating
disabled
ENGLISH
More Information
For detailed instructions for installing, configuring, and maintaining the probes, see HMP4, 5, 7,
8, and TMP1 User Guide in English M212022EN available at www.vaisala.com .
5
Page 6
HMP4 Probe
183 [7.20]
120 [4.72]
Fitting body
M22x1.5 or NPT1/2”
41 [1.61]
Ø 12
[0.47]
32 mm 27 mm
mm
[in]
41 [1.61]
Ø 12
[0.47]
Ø 13.5
[0.53]
253 [9.96]
243 [9.57]
mm
[in]
Figure 2 HMP4 Probe Head 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.
• Operating pressure 0 ... 10 MPa (0 ... 100 bar)
• M22x1.5 and NPT1/2” probe fittings included
• Sintered AISI316L filter standard in delivery
HMP5 Probe
Figure 3 HMP5 Probe Head 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)
• 250 mm (9.84 in) probe allows easy process installation through insulation
• Sintered AISI316L
6M211982EN-C
filter standard in delivery
Page 7
HMP7 Probe
99.5 [3.92]
79.5 [3.13]
37.5 [1.48]
Ø 12
[0.47]
Ø 12
[0.47]
Groove for
lock ring
mm
[in]
Ø 12
[0.47]
232 [9.13]
194 [7.64]
41 ... 149 [1.16 ... 5.87]
41 [1.61]
Ø 13.5
[0.53]
Fitting body
ISO1/2” or NPT1/2”
mm
[in]
Figure 4 HMP7 Probe Head Dimensions
Vaisala HUMICAPâ Humidity and Temperature Probe HMP7 is designed for applications which
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.
• Probe and sensor warming functions minimize condensation on probe
• Vapor and pressure proof construction
• Stainless steel mesh
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.
Probe heating is disabled by default. If you enable probe heating, output parameters that are
dependent on temperature measurement (such as relative humidity) are disabled 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.
filter standard in delivery
ENGLISH
HMP8 Probe
Figure 5 HMP8 Probe Head Dimensions
7
Page 8
Vaisala HUMICAPâ Humidity and Temperature Probe HMP8 is designed for pressurized
130 [5.12]
Ø 3.2 [0.13]
Ø 6 [0.24]
mm
[in]
applications in compressed air systems, refrigerant dryers, environmental chambers and other
pressurized industrial applications where easy insertion and removal of the probe and
adjustable installation depth into the pipeline are needed.
• Probe installation depth can be freely adjusted and probe can be hot-swapped from
pressurized pipelines with an installation valve
• Operating pressure 0 ... 4 MPa (0 ... 40 bar)
• ISO1/2" and NPT1/2" probe
• Sintered AISI316L filter standard in delivery
fittings and press handle included
TMP1 Probe
Figure 6 TMP1 Probe Head 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)
• Temperature accuracy up to 0.1 °C (0.18 °F)
8M211982EN-C
Page 9
Probe Body Dimensions and Pinout
136 [5.35]
Probe cable
2000 [78.74]
Ø 25
[0.98]
M12/5
1
5
34
2
M12/5
Male Connector
mm
[in]
Figure 7 Probe Body
ENGLISH
Pin #FunctionNotesWire Colors in Vaisala
1Power supplySupply voltage:
• HMP7: 18 ... 30 VDC
• Other models: 15 ... 30 VDC
Typical current 10 mA, max. 500 mA.
2RS-485-White
3Power GNDBlue
4RS-485+Black
5Not connectedGray
Cables
Brown
Recommended maximum length of the RS-485 line is 30 m (98 ft).
9
Page 10
Attaching Probes to Indigo Transmitters
Figure 8 Attaching the Probe to Indigo 200 Series
1. Insert the probe or the connection cable into the transmitter's connector. Use of
connection cable is recommended for strain relief.
2. Turn the locking wheel of the transmitter to lock the probe or cable in place.
Do not turn the probe or the cable itself, as that will damage the connectors.
3. If you are using a connection cable, connect the probe to the cable.
4. When the transmitter recognizes the connected probe, it shows a
the display.
10M211982EN-C
notification message on
Page 11
Installation
-40 ... +80 °C
(-40 ... +176 °F)
-70 ... +180 °C
(-94 ... +356 °F)
1
2
43
Figure 9 Example Installation of HMP8 Model
1Mount the probe head horizontally to prevent any water condensing on the probe head
from running to the sensors.
2Let the cable hang loosely to prevent condensed water from running along the cable to
the probe head.
3Attach 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.
ENGLISH
If the temperature of the measured environment diers greatly from ambient
temperature, the whole probe and preferably plenty of cable must be inside the
process. This prevents measurement inaccuracy caused by heat conduction along
the cable.
11
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Configuration
Vaisala Insight Software
Vaisala Insight software is a configuration software for Indigo-compatible devices. The
supported operating systems are Windows 7 (64-bit), Windows 8.1 (64-bit), and Windows 10
(64-bit).
With the Insight software, you can:
• See probe information and status
• See real-time measurement
• Calibrate and adjust the probe
Configure probe features such as measurement filtering, chemical purge, heating, and
•
serial communication
Download Vaisala Insight software at www.vaisala.com/insight.
The probe can be connected to Vaisala Insight software using a Vaisala USB cable (no.
242659).
Connecting to Insight Software
• Computer with Vaisala Insight software installed
• USB connection cable (no. 242659)
Figure 10 Connecting Probe to Insight
1. Open the Insight software.
2. Connect the USB cable to a free USB port on the PC.
3. Connect the probe to the USB cable.
4. Wait for Insight software to detect the probe.
12M211982EN-C
Page 13
Modbus
Serial Interface Settings
Table 1 Default Serial Interface Settings
PropertyDescription/Value
Bit rate19200
ParityNone
Data bits8
Stop bit2
Flow controlNone
ENGLISH
You can use up to ten probes on the same RS-485 line. You must configure each probe on the
line to have a
dierent Modbus address.
Measurement Data Registers
Table 2 Modbus Measurement Data Registers (Read-Only)
Register
Number
(Decimal)
Floating Point Values
10000
30002
70006
90008
11000A
13000C
14000E
160010
190012
210014
230016
Address
(Hexadecimal)
hex
hex
hex
hex
hex
hex
hex
hex
hex
hex
hex
Register DescriptionData FormatMetric Unit
Relative humidity32-bit float%RH
Temperature32-bit float°C
Dew point temperature32-bit float°C
Dew/frost point
32-bit float°C
temperature
Dew/frost point
32-bit float°C
temperature at 1 atm
Dew point temperature
32-bit float°C
at 1 atm
Absolute humidity32-bit float
g/m
3
Mixing ratio32-bit floatg/kg
Wet-bulb temperature32-bit float°C
Water vapor
concentration
32-bit floatppm
v
Water vapor pressure32-bit floathPa
13
Page 14
Register
Number
(Decimal)
Floating Point Values
Address
(He
250018
27001A
31001E
330020
650040
xadecimal)
he
x
hex
he
x
hex
he
x
Register DescriptionData FormatMetric Unit
Water vapor saturation
32-bit floathPa
pressure
Enthalpy32-bit floatkJ/kg
Dew point temperature
32-bit float°C
dierence
Absolute humidity at
32-bit float
g/m
3
NTP
Water vapor mass
fraction
32-bit floatppm
w
Configuration
Table 3 Modbus
Register
Number
(Decimal)
General
12890508
Compensation Setpoints
7690300
Configuration Data Registers (Writable)
Register
Address
(Hexadecim
al)
hex
he
x
Registers
Register DescriptionData
Probe heating
Available on HMP7 model
only.
When on, relative humidity
measurement is disabled
unless temperature is
written to register 0334
from an external source.
Pressure compensation
setpoint
on/o.
hex
Format
16-bit
boolean
Unit / Valid Range
0 = o (default)
1 = on
32-bit floatUnit: hPA
Default: 1013.25 hPa
14M211982EN-C
Page 15
Compensation Setpoints
8210334
Communication
15370600
hex
hex
Temperature
32-bit floatUnit: °C
compensation setpoint. If
a value is written to this
register, probe uses it
when calculating relative
humidity instead of its
own measurement.
When probe heating is in
use, temperature must be
written to this register to
enable relative humidity
measurement.