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DMP6 catalogue
Smart Dew Point Probe DMP6
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Vaisala DMP6 Dew Point Probe for Processes up to 350 °C
The Vaisala DRYCAP® Dew Point Probe DMP6 measures humidity directly inside very hot industrial processes using a robust probe and passive cooling set.
- Direct in-line measurement at process temperatures from +100 to +350 °C
- Dew point measurement range from −25 to +100 °C Td/f
- Passive cooling requires no power, cooling water or moving components
- Built-in Modbus RTU or integration with Vaisala Indigo transmitters
- Connect to Indigo80 for portable display, diagnostics, configuration and field calibration
Vaisala DMP6 Dew Point Probe for Very High Temperatures
The Vaisala DMP6 is designed for direct in-line humidity measurement in industrial processes operating at temperatures up to +350 °C. It combines a high-temperature probe with a passive cooling set that conducts heat away from the sensor and keeps the measurement element within its permitted operating range.
Because the cooling system has no moving parts and requires no electrical power, cooling water or compressed air, the DMP6 provides a straightforward way to measure inside hot dryers and ovens without a separate sampling system or heated sample line.
DMP6 at a Glance
| Primary application | Direct measurement in very hot industrial processes |
|---|---|
| Process temperature | +100 to +350 °C for direct high-temperature measurement |
| Dew point range | −25 to +100 °C Td/f |
| Dew point accuracy | ±2 °C Td/f |
| Digital output | Modbus RTU over RS-485 |
| Sensor | Vaisala DRYCAP® 180S |
| Probe-body protection | IP66 |
| Cooling method | Passive conduction cooling with configurable cooling fins |
Why Choose the DMP6?
- Measures directly up to +350 °C: monitor humidity inside hot processes instead of extracting and conditioning a sample.
- Passive cooling: the cooling set protects the sensing element without powered cooling equipment or moving parts.
- Wide high-dew-point range: measure from −25 to +100 °C Td/f in demanding drying applications.
- Stable DRYCAP measurement: automatic calibration and sensor purge support long-term stability and chemical resistance.
- Industrial durability: the sensor tolerates condensation, oil, dust and most chemicals encountered in process environments.
- Flexible connectivity: operate through Modbus RTU, an Indigo transmitter, Indigo80 or Vaisala Insight software.
Measurement and Operating Specifications
| Property | Specification |
|---|---|
| Dew point measurement range | −25 to +100 °C Td/f |
| Dew point accuracy | ±2 °C Td/f |
| Dry-to-wet response, 63% [90%] | 5 seconds [10 seconds] |
| Wet-to-dry response, 63% [90%] | 45 seconds [5 minutes] |
| Typical mixing-ratio range | 0 to 1000 g/kg |
| Probe-head process range | +100 to +350 °C for direct measurement with the cooling set |
| Probe-body operating range | −40 to +80 °C |
| Operating voltage | 15–30 V DC |
| Probe material | AISI 316L stainless steel |
| Standard probe cable | 2 m |
Passive Cooling for Direct Process Measurement
The DMP6 sensing head is installed inside the cooling set. Heat is conducted away from the probe through the cooling body and removable fins, reducing the sensor temperature without external cooling utilities. The number and arrangement of cooling fins are selected according to the actual process temperature.
Important: the sensor temperature must remain below +180 °C, including during abnormal process conditions. After installation and stabilisation, verify the sensor temperature and saturation-ratio diagnostics using Vaisala Insight software, Indigo80 or Modbus.
High gas velocity changes the cooling behaviour and can reduce performance or damage the assembly. Confirm the process temperature, airflow and mounting arrangement before finalising the installation.
Fixed or Portable Measurement
Permanent Process Installation
The DMP6 can connect directly to an automation or monitoring system using Modbus RTU. Where a permanent display, analogue output, relay or Ethernet connection is required, pair it with a compatible Vaisala Indigo transmitter.
- Vaisala Indigo510 and Indigo520 transmitters for robust industrial installations and expanded connectivity
- Vaisala Indigo300 transmitter for a rugged single-probe installation with local display
- Vaisala Indigo200 transmitters for compact single-probe measurement systems
Portable Use with Indigo80
Connect the DMP6 to the Vaisala Indigo80 handheld indicator for portable display, data logging, diagnostics, probe configuration and field calibration. Indigo80 can also read temperature from a second compatible probe when an external temperature-compensation value is required.
Portable-use note: Indigo80 makes the display and service functions portable; the DMP6 probe and cooling set remain mechanically installed for high-temperature process measurement. DMP80 is a separate handheld probe intended for portable dew point spot checks.
The DMP6 also works with Vaisala Insight PC software for configuration, diagnostics, temporary online monitoring and calibration support.
Typical Applications
- Industrial drying ovens
- Baking and food-processing ovens
- Ceramics, gypsum and building-material dryers
- Paper, wood and biomass drying processes
- High-temperature material treatment
- Other hot processes requiring direct humidity or dew point measurement
Installation and Ordering Considerations
Before ordering, confirm the normal and maximum process temperatures, expected dew point, gas velocity, duct or oven-wall construction, insulation thickness, available external clearance and required output. These details determine the cooling-fin arrangement and whether the DMP6 is suitable for the measurement point.
The probe should be installed where the gas represents the actual process condition. Avoid stagnant zones, direct contact with product, locations exposed to mechanical impact and positions where condensed water can collect around the cooling set.
Vaisala DMP Series Comparison
Choose the DMP probe according to the installation environment, process temperature, pressure and required dew point range.
| Model | Best suited to | Dew point range | Temperature or pressure limit | Installation |
|---|---|---|---|---|
| DMP1 | Dry rooms, battery production and semiconductor manufacturing | −70 to +80 °C Td/f | Probe operating temperature −40 to +80 °C | Compact fixed probe for distributed room monitoring |
| DMP5 | Hot industrial dryers, ovens and process ducts | −40 to +100 °C Td/f | Process temperature up to +180 °C | Long direct-insertion probe with adjustable mounting depth |
| DMP6 | Very-high-temperature dryers, ovens and industrial processes | −25 to +100 °C Td/f | Direct process measurement from +100 to +350 °C | Direct-insertion probe with a dedicated passive cooling set |
| DMP7 | Tight spaces, compact equipment, dry gas and compressed air | −70 to +80 °C Td/f | Process pressure up to 10 bar | Short 41 mm sensing head with pressure-tight fitting |
| DMP8 | Pressurised compressed-air and industrial-gas pipelines | −70 to +80 °C Td/f | Process pressure up to 40 bar absolute | Adjustable insertion depth with optional ball-valve installation |
Quick selection: choose DMP1 for distributed dry-room monitoring, DMP5 for processes up to +180 °C, DMP6 for very hot processes up to +350 °C, DMP7 when installation space is limited, and DMP8 for pressurised pipelines up to 40 bar.
All five probes support Modbus RTU, compatible Vaisala Indigo transmitters, the Indigo80 handheld indicator and Vaisala Insight software. The final selection should also consider process gas, flow velocity, mounting access, required outputs and calibration arrangements.
DMP6 Videos
Technical Resources
Vaisala DMP6 Supplier and Technical Support in Malaysia
Seacom Process Instruments supplies and supports the Vaisala DMP6 High-Temperature Dew Point Probe in Malaysia for industrial drying, ovens, food processing, building materials and other very-hot process applications.
Our team can assist with application review, cooling-set configuration, installation location, Indigo transmitter pairing, Indigo80 servicing arrangements, automation integration, commissioning and calibration planning.
Contact Seacom with your process temperature range, expected dew point, gas velocity, duct or oven construction, insulation thickness, available mounting clearance and required output so we can assess a suitable DMP6 arrangement.
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- Indigo201 with three analog outputs and two relays
- Indigo202 with Modbus RTU and two relays
- Colour display with numerical and graphical views
- IP65 enclosure for industrial measurement applications
The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
- Indigo510: one probe and two isolated analog outputs
- Indigo520: two probes, four isolated outputs and two relays
- Ethernet web interface and Modbus TCP communication
- Rugged IP66 and NEMA 4 metal enclosure
15 other products in the same category:
The Vaisala DMT143 and DMT143L provide compact, dependable dew-point measurement for small industrial dryers, compressed-air systems, glove boxes and OEM equipment.
- Dew-point measurement range across the family from −70 to +60 °C Td/f
- Accuracy up to ±2 °C Td/f
- Vaisala DRYCAP® technology with automatic calibration
- Resistant to condensation, compressor oil and particulate contamination
- Analog output and RS-485 with Modbus RTU options
- Compatible with the Vaisala Indigo80 handheld indicator
The Vaisala DRYCAP® Dew Point and Temperature Probe DMP7 is designed for accurate low-humidity measurement where installation space is limited.
- Short 41 mm probe for remote installation in tight spaces
- Dew point measurement range from −70 to +80 °C Td/f
- Pressure-tight installation for processes from 0 to 10 bar
- Use with Modbus RTU, an Indigo transmitter or the portable Indigo80 handheld indicator
- Suitable for dry rooms, compressed air, industrial drying and semiconductor equipment
The Vaisala DPT145 provides online dew-point, pressure and temperature measurement for SF6-insulated electrical equipment. The model is being discontinued and should not be specified for new projects.
- Measures dew point, pressure and temperature
- Calculates SF6 density, normalised pressure and moisture in ppm
- RS-485 communication with Modbus RTU
- Contact Seacom for availability and replacement assessment
The Vaisala DRYCAP® Dew Point and Temperature Probe DMP8 provides reliable low-humidity measurement in pressurised pipelines with adjustable installation depth.
- Dew point measurement range from −70 to +80 °C Td/f
- Designed for pressurised processes from 0 to 40 bar absolute
- Adjustable insertion depth with ISO R 1/2 or NPT 1/2 process connection
- Optional ball-valve kit permits insertion and removal without shutting down the process
- Use with Modbus RTU, an Indigo transmitter or the portable Indigo80 handheld indicator
The Vaisala DRYCAP® Dew Point and Temperature Probe DMP5 measures humidity directly in hot industrial processes with a long stainless-steel probe and adjustable installation depth.
- Direct in-line measurement at process temperatures up to +180 °C
- Dew point measurement range from −40 to +100 °C Td/f
- Long probe reaches through insulation and thick process walls
- Built-in Modbus RTU or integration with Vaisala Indigo transmitters
- Connect to Indigo80 for portable display, diagnostics, configuration and field calibration
The Vaisala DMT340 Series provided configurable dew-point and temperature measurement for industrial low-humidity applications. The series is discontinued and replaced by Vaisala Indigo500 transmitters with DMP7 or DMP8 smart probes.
- Former models: DMT341, DMT342, DMT344, DMT347 and DMT348
- Designed for dry rooms, industrial dryers, compressed air and process gases
- Legacy display, data logging, analog, relay and communication options
- Use DMP7 for compact, wall-mounted or tight-space applications
- Use DMP8 for pressurised processes and pipelines
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The Vaisala DMT153 provides traceable low-dew-point measurement for ultra-dry industrial processes. It is the current replacement for the DMT152, with modern analog, Modbus and Vaisala Indigo connectivity.
- Calibrated dew-point range from −80 to −20 °C Td/f
- Dew-point accuracy up to ±2 °C Td/f
- Operating pressure from vacuum to 50 bar absolute
- Analog outputs or RS-485 with Modbus RTU
- Compatible with Vaisala Indigo transmitters and Indigo80
- DRYCAP® sensor with automatic calibration and sensor purge
The Vaisala DMT132 is a compact and economical dew-point transmitter designed to verify refrigerant-dryer performance by measuring the actual outlet-air dew point.
- Dew-point measurement range from −30 to +50 °C Td/f
- Accuracy up to ±1 °C in the typical refrigerant-dryer range
- Two-wire, loop-powered 4–20 mA output
- Operating pressure up to 20 bar
- Resistant to condensation and compressor oil
- Optional warning LED and loop-powered display
The Vaisala DMT152 provides accurate dew-point measurement down to −80 °C Td/f for ultra-dry industrial and OEM applications. This model is discontinued and has been replaced by the Vaisala DMT153.
- Calibrated dew-point range from −80 to −20 °C Td/f
- Accuracy up to ±2 °C Td/f
- Operating pressure up to 50 bar
- Analog outputs and RS-485 communication
- DRYCAP® sensor resistant to condensation and contamination
- Use DMT153 for new projects
The Vaisala Indigo300 is a rugged industrial transmitter for one Vaisala Indigo-compatible smart probe, providing local measurement display and up to three configurable analog outputs.
Its corrosion-resistant IP66 metal enclosure, flexible probe mounting and interchangeable probe design make Indigo300 suitable for humidity, temperature, dew point, CO2, moisture in oil and other demanding industrial measurements.
The Vaisala DMP1 Dew Point and Temperature Probe provides fast, dependable low-humidity measurement for dry rooms and moisture-sensitive manufacturing areas.
- Dew point measurement range from −70 to +80 °C Td/f
- Fast response for detecting changes across large dry rooms
- Modbus RTU communication or integration with Vaisala Indigo transmitters
- Connect to Indigo80 for portable display, data logging, diagnostics and field calibration
- Suitable for battery production, semiconductor manufacturing and controlled dry environments
The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.
- Indigo201 with three analog outputs and two relays
- Indigo202 with Modbus RTU and two relays
- Colour display with numerical and graphical views
- IP65 enclosure for industrial measurement applications
The Vaisala DMT345 and DMT346 provided direct dew-point measurement in hot industrial drying processes. Both models are discontinued and replaced by Vaisala DMP5 or DMP6 smart probes with an Indigo transmitter.
- DMT345: former solution for processes up to +180 °C
- DMT346: former solution for very hot processes up to +350 °C
- DMT345 replacement: DMP5 with a suitable Indigo transmitter
- DMT346 replacement: DMP6 with a suitable Indigo transmitter
- Direct in-process measurement without a conventional sampling system
- Contact Seacom for mechanical and electrical migration review
The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
- Indigo510: one probe and two isolated analog outputs
- Indigo520: two probes, four isolated outputs and two relays
- Ethernet web interface and Modbus TCP communication
- Rugged IP66 and NEMA 4 metal enclosure
The Vaisala DPT146 combines dew-point and process-pressure measurement in one compact transmitter for compressed-air systems. This model is discontinued and should not be selected for new projects.
- Dew-point measurement from −70 to +30 °C Td
- Absolute-pressure measurement from 1 to 12 bar
- Pressure-compensated dew point and ppm calculation
- Analog outputs and RS-485 with Modbus RTU
- Contact Seacom for existing-unit support and replacement assessment