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DMT152 catalogue
Dew Point Transmitter for Very Dry Environment DMT152
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Vaisala DMT152 Dew Point Transmitter – Discontinued
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 This model is discontinued and has been replaced by the Vaisala DMT153.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
| Specification | DMT152 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
| Feature | DMT152 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 point | DMT152 | DMT153 |
|---|---|---|
| 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.
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- 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
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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
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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.
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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
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- Operating pressure from vacuum to 50 bar absolute
- Analog outputs or RS-485 with Modbus RTU
- Compatible with Vaisala Indigo transmitters and Indigo80
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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
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- 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 Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
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The Vaisala DRYCAP® Dew Point Probe DMP6 measures humidity directly inside very hot industrial processes using a robust probe and passive cooling set.
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- Dew point measurement range from −25 to +100 °C Td/f
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- Dew point measurement range from −70 to +80 °C Td/f
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- 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
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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.
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- 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
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- Dew-point measurement range from −30 to +50 °C Td/f
- Accuracy up to ±1 °C in the typical refrigerant-dryer range
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- Operating pressure up to 20 bar
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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
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- Connect to Indigo80 for portable display, diagnostics, configuration and field calibration
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
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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
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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
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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.
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- RS-485 communication with Modbus RTU
- Contact Seacom for availability and replacement assessment