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.
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.
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.
Vaisala Indigo510 and Indigo520 Flagship Transmitters
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
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 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 Dewpoint and Pressure Transmitter DPT146 for Compressed Air makes monitoring compressed air simple and convenient. The Vaisala Dewpoint Transmitter for Compressed Air DPT146 measures both dew point and process pressure simultaneously, and is the ideal choice for anyone using or monitoring compressed air.
- The first transmitter that monitors both dew point and process pressure - A simple and convenient transmitter for monitoring of compressed air - Highly accurate humidity information thanks to online pressure-compensated dew point data - Proven sensor technology - Compatible with the Vaisala Hand-Held DM70 for easy spot checking, local - display and data logging - Pressure: 1…10 bar - Dew point: -60 ... +30 °C
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 DRYCAP® Dewpoint Transmitter DMT152 is designed for measuring low dew point in OEM applications, even down to -80°C. The excellent long-term stability and reliability of its performance is based on the latest DRYCAP® polymer sensor technology. The DMT152 is an ideal choice for industrial applications where it is necessary to control very low humidity.
DMT152 is an ideal choice for the semiconductor industry, air and plastics dryers, glove boxes, dry chambers, pure gases, additive manufacturing, high voltage circuit breakers and other applications where it is critical to control humidity with high accuracy. DMT152 measures accurately and reliably also in the challenging combination of low humidity and hot air, which is typical in plastics drying.
Condensation-resistant Vaisala Dewpoint Transmitter DMT340 is designed for industrial low-humidity applications such as industrial drying, compressed air systems, semiconductor industry, dry rooms, baking ovens, and metal heat treatment to provide accurate and reliable measurement.
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 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 DRYCAP® Dewpoint Transmitters DMT345 and DMT346 are designed for humidity measurement in industrial drying applications with particularly high temperatures. The high temperature tolerance of the sensor allows direct measurement from hot process without the need for a sampling system and sample conditioning. The wide dynamic rage of the measurement in DMT345 and DMT346 is unique: Measurements can be made from -40 °C frost point up to +100 °C dew point, with dry-bulb temperatures ranging up to 350 °C.
Vaisala Indigo510 and Indigo520 Flagship Transmitters
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
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
Vaisala Miniature size dew point transmitters DMT143 and DMT143L are ideal choices when you want to measure dew point accurately in small compressed air dryers, plastic dryers, additive manufacturing and other OEM applications. They are easy to integrate and can be used in Vaisala DM70 hand-held. The long version has replaced the DMT242.
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
.png)
DMP6 Catalogue
(194.41k)
