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DMT143 catalogue
Miniature Dew Point Transmitters DMT143
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Vaisala DMT143 and DMT143L Miniature Dew Point Transmitters
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
Compact Dew Point Measurement for OEM Equipment and Dryers
The Vaisala DMT143 and longer DMT143L are miniature transmitters for continuous dew-point monitoring where installation space is limited. Their stainless-steel construction, stable Vaisala DRYCAP® sensor and configurable electrical options make them practical for integration into new equipment as well as replacement projects.
Typical applications include small compressed-air and plastics dryers, additive-manufacturing equipment, glove boxes, dry chambers, battery-production equipment and other OEM systems handling dry, non-corrosive gases.
DMT143 or DMT143L?
| Selection point | DMT143 | DMT143L |
|---|---|---|
| Best fit | Compact general-purpose OEM integration | Long-body installation where additional insertion or mounting reach is useful |
| Available process connections | G1/2, NPT 1/2 and selected UNF threads | G1/2 or NPT 1/2 |
| Analog output | Voltage or current options, depending on configuration | 4–20 mA, three-wire |
| Digital communication | RS-485 with Modbus RTU | RS-485 with Modbus RTU |
| Operating pressure | Up to 20 bar as standard; selected configurations permit higher pressure | Up to 20 bar absolute |
| Housing | AISI 316L stainless steel | AISI 316L stainless steel |
The exact transmitter should be selected from the current order form because dew-point range, process thread, output signal, connector and alarm indication depend on the ordered configuration.
Why Use the DMT143 Family?
- Compact installation: the miniature body fits small pipelines, dryer assemblies and crowded OEM enclosures.
- Reliable after condensation: the DRYCAP® sensor tolerates occasional water exposure and recovers when dry conditions return.
- Stable dry-end measurement: automatic calibration helps correct sensor drift in low-humidity conditions.
- Simple condition indication: an optional LED can indicate an exceeded dew-point threshold.
- Practical maintenance: the recommended calibration interval is two years for normal applications.
Compare DMT143, DMT132 and DMT153
| Selection point | DMT143 / DMT143L | DMT132 | DMT153 |
|---|---|---|---|
| Current status | Current | Current | Current; successor to DMT152 |
| Best application | Small dryers, glove boxes, compressed air and general OEM integration | Refrigerant dryers and economical dryer-performance monitoring | Very-low-dew-point OEM and industrial applications |
| Calibrated dew-point range | Configuration-dependent; family coverage extends from −70 to +60 °C Td/f | −30 to +50 °C Td/f | −80 to −20 °C Td/f |
| Typical accuracy | Up to ±2 °C Td/f | Up to ±1 °C in the refrigerant-dryer range | ±2 °C from −80 to −40 °C Td/f; ±3 °C from −40 to −20 °C Td/f |
| Sensor technology | DRYCAP® | HUMICAP® | DRYCAP® |
| Pressure capability | Up to 20 bar standard; selected DMT143 configurations up to 50 bar | Up to 20 bar | Up to 50 bar absolute |
| Primary output options | Analog output and RS-485 Modbus RTU | Two-wire 4–20 mA; service RS-485 | Analog output or RS-485 with Modbus RTU |
| Portable and transmitter compatibility | Indigo80 handheld indicator | HM70 or DM70 handheld for spot-checking | Indigo transmitters and Indigo80 handheld indicator |
| Best choice when | You need a small, versatile transmitter for dry industrial gas | You need cost-effective verification of a refrigerant dryer | You need traceable measurement down to −80 °C Td/f with modern connectivity |
Choose by operating range: DMT132 is intended mainly for refrigerant dryers, DMT143/DMT143L provide compact and flexible OEM dew-point measurement, and DMT153 is the current choice for demanding ultra-dry applications down to −80 °C Td/f.
Portable Checking with Vaisala Indigo80
The DMT143 family can be connected to the Vaisala Indigo80 handheld indicator for local viewing, diagnostics and field checks. Confirm the correct connection cable and supported functions for the exact transmitter version when selecting accessories.
Vaisala DMT143 and DMT143L Supplier in Malaysia
Seacom Process Instruments supplies and supports the Vaisala DMT143 and DMT143L miniature dew point transmitters in Malaysia for compressed-air dryers, plastics dryers, glove boxes, additive manufacturing, battery production and OEM equipment.
Our team can assist with model selection, process connections, output configuration, sampling cells, installation arrangement, Indigo80 compatibility and calibration planning.
Contact Seacom with your dew-point range, operating pressure and temperature, gas type, process connection, required output and equipment layout so we can recommend a suitable DMT143 or DMT143L configuration.
You might also like
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
15 other products in the same category:
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 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 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 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 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 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 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 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 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 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
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 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 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 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 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