The Vaisala DRYCAP® Dew Point and Temperature Probe DMP7 is designed for accurate low-humidity measurement where installation space is limited.
The Vaisala DMP7 is a compact industrial probe for measuring low dew points in locations where a conventional probe is difficult to install. Its short sensing head can be mounted directly in a process or connected remotely to an Indigo transmitter, making it particularly useful inside compact equipment, dry-air systems and restricted pipework.
Vaisala DRYCAP® sensor technology provides stable measurement in demanding low-humidity conditions. The sensor tolerates condensation, oil, dust and most chemicals, while automatic sensor purge helps maintain performance between calibration intervals.
| Measured parameters | Dew point or frost point, temperature and calculated humidity parameters |
|---|---|
| Dew point range | −70 to +80 °C Td/f |
| Continuous-use dew point range | −70 to +45 °C Td/f |
| Dew point accuracy | Up to ±2 °C Td/f |
| Temperature range | 0 to +80 °C |
| Process pressure | 0 to 10 bar with the pressure-tight fitting |
| Probe length | 41 mm |
| Digital output | Modbus RTU over RS-485 |
| Sensor | Vaisala DRYCAP® 180M |
For straightforward digital integration, the DMP7 can operate as a standalone Modbus RTU device. Where a permanent local display, analogue signal, relay control or Ethernet connection is required, pair it with a compatible Vaisala Indigo transmitter.
The DMP7 can also connect to the Vaisala Indigo80 handheld indicator, turning the installed-probe technology into a portable measurement and diagnostic setup. Indigo80 can display live readings, log measurement data and support field checking or adjustment of compatible probes. Up to two compatible Vaisala measurement devices can be connected at the same time, which is useful when comparing locations or using a second probe for a supporting measurement.
Product distinction: DMP7 is an Indigo-compatible industrial probe that can be used with Indigo80. DMP80 is a separate portable dew point probe designed specifically for handheld measurement with Indigo80.
The DMP7 also works with Vaisala Insight PC software for configuration, diagnostics, data viewing and field calibration.
| Selection point | DMP7 | DMP8 |
|---|---|---|
| Best suited to | Tight spaces and compact equipment | Pressurised pipelines requiring adjustable insertion depth |
| Maximum pressure | 10 bar | 40 bar |
| Installation | Short, pressure-tight probe fitting | Adjustable installation with a ball-valve option |
Selection note: choose the DMP7 when physical clearance is the main constraint. For higher-pressure pipelines or installations that need adjustable probe depth and easy removal, consider the DMP8.
Before selecting the probe and accessories, confirm the expected dew point, process temperature, operating pressure, available installation space, process connection and required output. Also decide whether the application needs direct Modbus communication, a permanent Indigo transmitter or portable operation with Indigo80.
Correct probe placement is important. The measurement point should represent the actual process condition and avoid stagnant pockets, leaks, ambient-air ingress and locations where condensate can collect.
Choose the DMP probe according to the installation environment, process temperature, pressure and required dew point range.
| Model | Best suited to | Dew point range | Temperature or pressure limit | Installation |
|---|---|---|---|---|
| DMP1 | Dry rooms, battery production and semiconductor manufacturing | −70 to +80 °C Td/f | Probe operating temperature −40 to +80 °C | Compact fixed probe for distributed room monitoring |
| DMP5 | Hot industrial dryers, ovens and process ducts | −40 to +100 °C Td/f | Process temperature up to +180 °C | Long direct-insertion probe with adjustable mounting depth |
| DMP6 | Very-high-temperature dryers, ovens and industrial processes | −25 to +100 °C Td/f | Direct process measurement from +100 to +350 °C | Direct-insertion probe with a dedicated passive cooling set |
| DMP7 | Tight spaces, compact equipment, dry gas and compressed air | −70 to +80 °C Td/f | Process pressure up to 10 bar | Short 41 mm sensing head with pressure-tight fitting |
| DMP8 | Pressurised compressed-air and industrial-gas pipelines | −70 to +80 °C Td/f | Process pressure up to 40 bar absolute | Adjustable insertion depth with optional ball-valve installation |
Quick selection: choose DMP1 for distributed dry-room monitoring, DMP5 for processes up to +180 °C, DMP6 for very hot processes up to +350 °C, DMP7 when installation space is limited, and DMP8 for pressurised pipelines up to 40 bar.
All five probes support Modbus RTU, compatible Vaisala Indigo transmitters, the Indigo80 handheld indicator and Vaisala Insight software. The final selection should also consider process gas, flow velocity, mounting access, required outputs and calibration arrangements.
Seacom Process Instruments supplies and supports the Vaisala DMP7 Dew Point and Temperature Probe in Malaysia for semiconductor manufacturing, dry rooms, compressed-air systems, industrial drying and other low-humidity applications.
Our team can assist with probe selection, installation fittings, measurement-point review, Indigo transmitter pairing, portable Indigo80 arrangements, system integration, commissioning and calibration planning.
Contact Seacom with your dew-point range, process temperature and pressure, available mounting space, process connection and required output, and whether the measurement will be fixed or portable, so we can recommend a suitable DMP7 arrangement.
The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.
The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
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.
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.
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.
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 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.
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.
The Vaisala DRYCAP® Dew Point and Temperature Probe DMP8 provides reliable low-humidity measurement in pressurised pipelines with adjustable installation depth.
The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.
The Vaisala DMP1 Dew Point and Temperature Probe provides fast, dependable low-humidity measurement for dry rooms and moisture-sensitive manufacturing areas.
The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.
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.
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.
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.
The Vaisala DMT143 and DMT143L provide compact, dependable dew-point measurement for small industrial dryers, compressed-air systems, glove boxes and OEM equipment.
The Vaisala DRYCAP® Dew Point Probe DMP6 measures humidity directly inside very hot industrial processes using a robust probe and passive cooling set.
