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DMP6 catalogue
Smart Dew Point Probe DMP6
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Vaisala DMT340 Dew Point and Temperature Transmitter – Discontinued
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
- Pair the selected probe with an Indigo500 transmitter
Product status: The Vaisala DMT340 Series is discontinued. For new projects and replacement planning, Vaisala recommends an Indigo500 Series transmitter with a DMP7 or DMP8 dew-point probe, selected according to the former DMT340 probe model and installation.
Vaisala DMT340 Series for Existing Installations
The Vaisala DMT340 Series was a configurable platform for continuous dew-point and temperature measurement in demanding low-humidity processes. Different probe constructions allowed the transmitter to serve dry rooms, industrial drying, compressed-air systems, semiconductor equipment, process gases and pressurised pipelines.
The transmitter could be configured with a local graphical display, analog outputs, alarm relays, data logging and digital communication. Because these functions and the mechanical probe arrangement varied by order code, a replacement must be based on the complete installed configuration rather than the DMT340 family name alone.
Current Replacement for Each DMT340 Model
| Legacy model | Original installation | Current starting point | Replacement note |
|---|---|---|---|
| DMT341 | Wall-mounted probe for low-humidity spaces | DMP1 + Indigo500 | Review the mounting position, cable length and required measurement range. |
| DMT342 | Small flanged probe, commonly used with a sampling arrangement | DMP7 + Indigo500 , subject to application review | Vaisala does not name a direct DMT342 equivalent. Confirm the flange, sampling-cell arrangement and process conditions before selection. |
| DMT344 | Pressure-tight probe for pressurised processes | DMP8 + Indigo500 | Confirm the pressure rating, process thread, insertion depth and whether removal under pressure is required. |
| DMT347 | Small pressure-tight probe for compact installations | DMP7 + Indigo500 | Check the mechanical connection, pressure requirements and available installation space carefully. |
| DMT348 | Adjustable probe for pressurised pipelines | DMP8 + Indigo500 | DMP8 provides adjustable insertion depth and supports an optional ball-valve installation kit for pressurised pipelines. |
Explore the Vaisala DMP7 for tight spaces
Explore the Vaisala DMP8 for pressurised pipelines
Other Vaisala DMP Dew Point Probes Available from Seacom
The wider Vaisala Indigo-compatible DMP family covers dry rooms, high-temperature processes, tight installations and pressurised pipelines. These probes are not interchangeable solely by measurement range; select according to the process temperature, pressure, mounting and required insertion arrangement.
| Probe | Main strength | Typical application | Seacom product page |
|---|---|---|---|
| DMP1 | Fixed probe for room and wall installations | Battery dry rooms, semiconductor areas and controlled low-humidity spaces | View Vaisala DMP1 |
| DMP5 | Long probe for processes up to +180 °C | Ovens, dryers and high-temperature industrial processes | View Vaisala DMP5 |
| DMP6 | Passive cooling for processes up to +350 °C | Very-high-temperature ovens, furnaces and industrial drying | View Vaisala DMP6 |
| DMP7 | Short remote probe for limited installation space | Tight equipment, dry rooms, semiconductor tools and remote installations | View Vaisala DMP7 |
| DMP8 | Adjustable insertion into pressurised pipelines | Compressed air, industrial gases and pressurised low-humidity processes | View Vaisala DMP8 |
For a DMT340 replacement: Vaisala specifically directs the former DMT341 and DMT347 applications towards DMP7, and the former DMT344 and DMT348 applications towards DMP8. DMP1, DMP5 and DMP6 serve different mounting or temperature requirements and should only be selected after reviewing the application.
Why Use an Indigo500 Transmitter?
The Indigo platform separates the measurement probe from the display and system-interface transmitter. The DMP probe contains the measurement intelligence and calibration data, while the Indigo500 transmitter provides local indication, outputs, relays, data handling and network access according to the selected model.
| Function | Indigo510 | Indigo520 |
|---|---|---|
| Probe inputs | One compatible probe | Two compatible probes |
| Analog outputs | Two configurable and isolated channels | Four configurable and isolated channels |
| Relays | Not included | Two configurable relays |
| Ethernet | Web interface and Modbus TCP | Web interface and Modbus TCP |
| Enclosure | Rugged IP66 / NEMA 4 metal housing | Rugged IP66 / NEMA 4 metal housing |
| Typical selection | Single-probe installation with straightforward system outputs | Dual-probe, relay or more extensive output requirements |
Compare Vaisala Indigo510 and Indigo520 transmitters
DMT340 and Indigo Migration Considerations
| Migration item | What to verify |
|---|---|
| Legacy probe model | Identify whether the installed unit is DMT341, DMT342, DMT344, DMT347 or DMT348 |
| Mechanical installation | Thread, flange, insertion depth, pressure seal, sampling cell and isolation method |
| Measurement range | Required dew point, frost point, temperature and calculated parameters |
| Analog outputs | Signal type, scaling, number of channels and galvanic isolation |
| Digital communication | Existing serial or Ethernet protocol, register mapping and receiving-system configuration |
| Alarm functions | Relay quantity, alarm logic, set points, delays and fail-safe behaviour |
| Power supply | Available AC or DC supply and existing wiring |
| Data logging | Required history, trends, export and time synchronisation |
| Physical replacement | Wall space, cable entry and use of an Indigo adapter plate for the former transmitter location |
An Indigo adapter plate can simplify mounting at a former DMT340 transmitter location, but it does not eliminate the need to review wiring, probe installation and system configuration.
Existing DMT340 Installations
For an operating DMT340, retain the complete order code, probe model, output scaling, relay settings, communication configuration, calibration certificates and installation drawings. These records are essential for service work and for specifying a suitable Indigo replacement.
Product discontinuation does not by itself require immediate removal of a functioning transmitter. Plan replacement around calibration status, spare availability, maintenance risk, shutdown access and the importance of the measurement to the process.
Vaisala DMT340 Support and Indigo Migration in Malaysia
Seacom Process Instruments supports existing Vaisala DMT340 Series installations in Malaysia and supplies current Indigo500, DMP7 and DMP8 configurations for dry rooms, compressed air, industrial drying, semiconductor manufacturing and pressurised low-humidity processes.
Our team can assist with legacy model identification, process connections, probe selection, Indigo510 or Indigo520 configuration, analog and digital integration, relay requirements, mounting arrangements, commissioning and calibration planning.
Contact Seacom with the complete DMT340 order code, application, operating pressure and temperature, dew-point range, mechanical connection, outputs and communication requirements so we can assess the correct Indigo replacement configuration.
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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® 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
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
15 other products in the same category:
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 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 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
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 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 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 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 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 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 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 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
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 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 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 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.