Vaisala DMT143 and DMT143L Miniature Dew Point Transmitters

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 pointDMT143DMT143L
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 pointDMT143 / DMT143LDMT132DMT153
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.

Download

  DMT143 Catalogue   (210.05k)

  DMT143L Catalogue   (201.61k)

  DMT143 DMT143L Order Form   (253.93k)

  DMT132 Catalogue   (372.13k)

  DMT153 Catalogue   (603.31k)


Specific References

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