The Vaisala HMP5 provides high-accuracy humidity and temperature measurement in ovens, dryers, kilns and other processes operating at temperatures up to +180 °C.
The Vaisala HUMICAP® Humidity and Temperature Probe HMP5 is designed for high-temperature industrial processes where accurate humidity measurement, chemical tolerance and long-term stability are essential.
Its long 250 mm stainless-steel probe can be installed through process insulation and positioned directly in the measurement environment. The probe head measures temperatures from −70 to +180 °C, while the cable separates the probe electronics from the hottest part of the process.
The HMP5 is particularly suitable for baking ovens, food and pasta dryers, industrial drying kilns, ceramics production, wood drying and other heated processes. It provides humidity accuracy up to ±0.8% RH and temperature accuracy up to ±0.1 °C under specified conditions.
Built-in Modbus RTU communication allows the HMP5 to operate as a standalone digital transmitter. It can also connect to a Vaisala Indigo transmitter for local display, analog outputs, relays, Ethernet connectivity and additional system-integration options.
| Measurement Specification | Performance |
|---|---|
| Relative-Humidity Range | 0–100% RH, at a maximum dew-point temperature of +95 °C |
| RH Accuracy at +23 °C | ±0.8% RH from 0–90% RH |
| RH Factory-Calibration Uncertainty | ±0.5% RH from 0–40% RH; ±0.8% RH from 40–95% RH |
| RH Response Time | 15 seconds, T63 |
| Humidity Sensor Options | Vaisala HUMICAP® R2 or HUMICAP® R2C |
| Temperature Range | −70 to +180 °C |
| Temperature Accuracy at +23 °C | ±0.1 °C |
| Temperature Factory-Calibration Uncertainty | ±0.1 °C at +23 °C |
| Temperature Sensor | Pt100 RTD Class F0.1 according to IEC 60751 |
| Environmental Specification | Operating Limit |
|---|---|
| Probe-Head Temperature | −70 to +180 °C |
| Probe-Body Temperature | −40 to +80 °C |
| Probe-Head Humidity Limit | Maximum +100 °C dew-point temperature |
| Storage Temperature | −40 to +80 °C |
| Operating Environment | Suitable for outdoor use |
| Probe-Body Protection | IP66 |
| Feature | Specification |
|---|---|
| Operating Voltage | 15–30 V DC |
| Typical Current Consumption | 10 mA |
| Maximum Current Consumption | 500 mA |
| Digital Interface | RS-485, non-isolated |
| Communication Protocol | Modbus RTU |
| Electrical Connector | M12 five-pin A-coded male |
| Mechanical Feature | Specification |
|---|---|
| Probe Length | Approximately 253 mm |
| Probe Diameter | 12 mm |
| Probe Material | AISI 316L stainless steel |
| Probe-Body Material | AISI 316L stainless steel |
| Cable Jacket | FEP |
| Available Cable Lengths | 2 m or 10 m |
| Approximate Weight | 436 g with a 2 m cable |
| Standard Filter | Sintered AISI 316L stainless-steel filter |
| Optional Mounting Flange | Vaisala 210696 |
In addition to relative humidity and temperature, the HMP5 calculates multiple humidity parameters for process control, drying analysis and quality monitoring.
| Transmitter | Recommended Configuration | Product Link |
|---|---|---|
| Indigo200 Series | Standard single-probe transmitter with display and practical analog, relay or Modbus options | Vaisala Indigo200 |
| Indigo300 | Rugged IP66 metal transmitter for one probe with up to three configurable analog outputs | Vaisala Indigo300 |
| Indigo510 | Simplified flagship transmitter for one probe with isolated outputs, Ethernet and Modbus TCP | Vaisala Indigo510 |
| Indigo520 | Full dual-probe flagship with four isolated outputs, two relays, Ethernet and Modbus TCP | Vaisala Indigo520 |
The connection cable between an HMP5 and a compatible Indigo transmitter can be extended to a total distance of up to approximately 30 m using the appropriate Vaisala cabling arrangement.
| Requirement | Recommended Configuration |
|---|---|
| Direct Modbus RTU integration | Standalone HMP5 connected to an RS-485 network |
| Compact display and standard outputs | HMP5 with Indigo200 |
| Rugged metal transmitter and analog outputs | HMP5 with Indigo300 |
| Ethernet, isolated outputs and one probe | HMP5 with Indigo510 |
| Two probes, outputs and relays | HMP5 with Indigo520 |
| Portable diagnostics and field calibration | HMP5 with Indigo80 and the appropriate cable |
View the Vaisala Indigo80 Portable Meter
The HMP5 is calibrated and adjusted before delivery and includes a traceable calibration certificate. Calibration and adjustment can be performed using Vaisala Insight PC software, a compatible Indigo transmitter or an Indigo80 handheld indicator.
Calibration frequency should be determined according to the operating temperature, contamination level, process criticality and quality-system requirements. Sensor purge helps maintain stability in chemically challenging environments but does not replace scheduled calibration.
Vaisala HMP1, HMP3, HMP4, HMP5, HMP7, HMP8 and HMP9 can be connected to the Vaisala Indigo80 Handheld Indicator using a compatible connection cable.
Portable measurement and field servicing: use Indigo80 to display live humidity and temperature readings, record measurement data, check probe performance, configure settings, and perform field calibration and adjustment. The same Indigo80 can support different compatible probes, making it practical for servicing multiple measurement points.
Vaisala Indigo-compatible HMP probes share the same measurement platform, but their mechanical design and installation method suit different conditions. Use the table below to identify the best starting point for your application.
| Probe | Main strength | Recommended application | Product |
|---|---|---|---|
| HMP1 | Compact wall-mounted probe for indoor environments | Cleanrooms, laboratories, data centres, warehouses and demanding HVAC | Vaisala HMP1 |
| HMP3 | Field-maintainable general-purpose 12 mm probe | Ducts, chambers, paint booths, air-handling units and industrial HVAC | Vaisala HMP3 |
| HMP4 | High-pressure measurement up to 100 bar | Compressed air, breathing air, industrial gases and vacuum systems | Vaisala HMP4 |
| HMP5 | Long probe for high temperatures up to +180 °C | Ovens, kilns, baking processes and high-temperature dryers | Vaisala HMP5 |
| HMP7 | Heated probe for continuous high humidity | Near-condensing chambers, humidifiers, drying processes and other persistently humid conditions | Vaisala HMP7 |
| HMP8 | Adjustable-depth probe for pressurised pipelines | Compressed-air lines, refrigerant dryers and industrial pipelines requiring easy probe removal | Vaisala HMP8 |
| HMP9 | Compact 5 mm probe head with fast response | Tight spaces, rapidly changing air, compact equipment, ducts and data centres | Vaisala HMP9 |
Seacom Process Instruments supplies and supports the Vaisala HMP5 high-temperature humidity and temperature probe in Malaysia for ovens, dryers, kilns, food processing, ceramics, wood drying and other heated industrial processes.
Our team can assist with confirming the operating temperature, humidity range, dew-point temperature, insertion depth, cable length, mounting flange, filter, sensor option and Indigo transmitter required for the application.
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The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.
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The Vaisala XMP10 Series comprises compact humidity and temperature probes offering accuracy levels up to ±1% RH and ±0.1 °C for demanding HVAC, data-centre and critical-environment applications.
The probes feature analog or Modbus RTU outputs, a standard M8 connector, an IP65-rated body and compatibility with Vaisala Origo10 modular HVAC transmitters.
The Vaisala HMW90 Series provides high-accuracy humidity and temperature measurement for demanding indoor HVAC and controlled-environment applications.
The Vaisala HMP9 combines a miniature 5 mm probe head with fast-response, high-accuracy humidity and temperature measurement for tight spaces and rapidly changing environments.
The Vaisala HMT330 Series was a flagship industrial transmitter platform for humidity, temperature and calculated moisture parameters. It is discontinued and replaced by an Indigo500 transmitter with the HMP probe selected for the application.
The Vaisala HMP8 provides high-accuracy humidity and temperature measurement in compressed air, refrigerant dryers and pressurised industrial processes up to 40 bar.
The Vaisala HMP110 is a high-accuracy humidity and temperature probe designed for demanding equipment integration, environmental chambers, data loggers, incubators and controlled-environment applications.
It provides ±1.5% RH accuracy, a 0–100% RH range, −40 °C to +80 °C temperature measurement, a chemically resistant HUMICAP 180R sensor and analog or Modbus RTU output options.
The Vaisala HMP4 provides high-accuracy humidity and temperature measurement in compressed air, breathing air, industrial gases, vacuum systems and other processes operating at pressures up to 100 bar.
The Vaisala HMP7 is designed for continuously humid, rapidly changing and near-condensing environments. Probe heating helps prevent condensation while maintaining reliable process measurement.
The Vaisala HMDW80 Series provides cost-effective humidity and temperature measurement for routine HVAC and building-automation applications.
The Vaisala HMX110 Series provides accurate humidity and temperature measurement for demanding indoor, duct and outdoor HVAC applications.
The Vaisala Origo10 Series comprises modular HVAC transmitters with interchangeable probes for humidity, temperature, CO2 and dew-point measurement.
Available with analog, Modbus RTU and BACnet MS/TP outputs, wall or duct mounting, an optional display and an IP65-rated enclosure.
The Vaisala HMT140 Wi-Fi Data Logger has been discontinued and is no longer recommended for new monitoring systems.
The Vaisala HMP5 provides high-accuracy humidity and temperature measurement in ovens, dryers, kilns and other processes operating at temperatures up to +180 °C.
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