Vaisala DMT152 Dew Point Transmitter – Discontinued

Vaisala DMT152 Dew Point Transmitter for Very Dry Environments

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 This model is discontinued and has been replaced by the Vaisala DMT153.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

Product status: Vaisala is discontinuing the DMT152 and states that it should not be specified for new projects. The Vaisala DMT153 is the official successor, retaining the same core measurement range and DRYCAP® 180U sensor while adding current connectivity and service tools.

Vaisala DMT152 for Existing Ultra-Dry Applications

The Vaisala DRYCAP® DMT152 was developed for very-low-dew-point measurement in semiconductor and battery manufacturing, plastics and compressed-air dryers, glove boxes, dry chambers, pure-gas systems, additive manufacturing and other moisture-sensitive processes.

Its compact stainless-steel construction supports direct process installation or use with a sampling cell. The sensor tolerates temporary condensation and provides stable performance in demanding combinations of low humidity and elevated gas temperature.

DMT152 Measurement Performance

SpecificationDMT152 performance
Sensor Vaisala DRYCAP® 180U
Calibrated dew/frost-point range −80 to −20 °C Td/f
Non-calibrated output range −100 to +20 °C Td/f
Accuracy from −80 to −40 °C Td/f ±2 °C Td/f
Accuracy from −40 to −20 °C Td/f ±3 °C Td/f
Typical dry-to-wet response 2 seconds to 63%; 5 seconds to 90%
Typical wet-to-dry response 30 seconds to 63%; 7.5 minutes to 90%
Typical long-term stability Better than 2 °C Td/f per year
Recommended calibration interval Two years under normal conditions

Legacy Outputs and Installation

FeatureDMT152 configuration
Analog outputs Configurable current or voltage outputs, depending on ordered model
Digital communication RS-485
Operating pressure Up to 50 bar with the correct supply and installation
Process connections G1/2, NPT 1/2 and selected UNF options
Electrical connections Two four-pin M8 connectors
Handheld compatibility Vaisala MI70 platform
Protection rating IP66
Wetted housing material AISI 316L stainless steel

Replacing DMT152 with DMT153

The DMT153 is designed to provide familiar DMT152 measurement performance while updating the electrical connection, digital protocol, portable tools and transmitter-platform compatibility. It is the correct starting point for new specifications and most DMT152 migration projects.

Migration pointDMT152DMT153
Product status Discontinued Current official successor
Calibrated range −80 to −20 °C Td/f −80 to −20 °C Td/f
Accuracy ±2 °C from −80 to −40 °C; ±3 °C from −40 to −20 °C Same core accuracy
Sensor and algorithm DRYCAP® 180U DRYCAP® 180U with the same core algorithm
Analog signals Current or voltage options One current and one voltage channel in analog mode
Digital communication RS-485 Modbus RTU over RS-485
Operating mode Configuration-dependent legacy arrangement Standalone analog mode or digital mode; not simultaneous
Electrical connector Two M8 four-pin connectors One M12 five-pin connector
Portable indicator MI70 Indigo80; not backward compatible with MI70
Transmitter platform Not Indigo compatible Compatible with Vaisala Indigo transmitters
Configuration software Legacy service tools Vaisala Insight PC software
Process threads Included a 5/8-18 UNF option G1/2, NPT 1/2 or UNF 3/4-16

Not a direct wiring swap: DMT153 replaces the DMT152 functionally, but its M12 connector, wiring, output-mode logic, available process threads and handheld platform differ. Check the complete installed DMT152 order code and receiving system before ordering a replacement.

Explore the Vaisala DMT153 replacement

Information Needed for a DMT152 Replacement

  • Complete DMT152 order code and serial number
  • Required dew-point or ppm measurement range
  • Gas type, operating pressure and gas temperature
  • Existing process connection or sampling cell
  • Analog signal type, scaling and receiving-system input
  • RS-485 use and existing communication settings
  • Power supply, cable arrangement and connector access
  • Portable indicator, calibration and data-logging requirements

Direct Installation and Sampling Systems

DMT152 installations may measure directly at process pressure or through a sampling cell. Retaining the same measurement location does not automatically guarantee the same performance after replacement: check leaks, tubing material, sample flow, pressure reduction, isolation method and the time required for the system to reach equilibrium.

Ultra-dry measurements are particularly sensitive to ambient-air ingress and moisture released from sampling tubes. Use clean stainless-steel tubing, minimise joints and dead volumes, and locate the measurement point as close to the process as practical.

Existing DMT152 Maintenance

For an operating DMT152, retain its manuals, calibration records, order code, output scaling and wiring documentation. Continued service, calibration and remaining product availability should be checked for the individual unit and application.

Do not change a working installation solely because the product has entered discontinuation. Plan the migration according to maintenance risk, spare availability, calibration schedule, shutdown access and the importance of the measurement to production.

Vaisala DMT152 Support and DMT153 Migration in Malaysia

Seacom Process Instruments supports existing Vaisala DMT152 installations in Malaysia and supplies the current Vaisala DMT153 replacement for battery production, semiconductor manufacturing, pure-gas systems, compressed air, plastics drying, glove boxes and other ultra-dry applications.

Our team can assist with product-status checks, order-code review, output and wiring comparison, process connections, sampling cells, Indigo integration, Indigo80 portable use and calibration planning.

Contact Seacom with the existing DMT152 model code, process conditions, required outputs, connection details and receiving-system configuration so we can assess a suitable DMT153 migration arrangement.

Download

  DMT152 Catalogue   (192.63k)

  DMT152 Order Form   (412.2k)

  DMT153 Catalogue   (603.31k)


Specific References

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