Dew Point Meters
Dew point measurement products and selection guidance for compressed air and industrial gas.
Dew Point Guide
Maintain the dew point guide, selection factors and educational copy here. Product cards and comparison rows below remain structured for reuse.
Dew Point Products
Dew point Meter with Alarm Function M191x
- Sensor options cover portable checks, continuous monitoring and alarm duty.
- Fast response and stable readings support compressed-air and gas quality review.
- Display and relay output options help operators monitor dryness at a glance.
- Industrial housings suit plant environments and sampling points.
- Accuracy (Dew Point)
- +/- 2 C Td (+20 ... -60 C Td); +/- 3 C Td (-60 ... -100 C Td)
- Measurement Range (Dew Point)
- 191A: -60 ... +60 C Td; 191B: -80 ... +20 C Td; 191C: -110 ... +20 C Td
- Measurement Range (Temperature)
- -40 ... +100 C
- Measurement Range (Pressure)
- 0 ... 25 MPa(a)
Portable Dew Point Meter M305x
- Portable configuration for maintenance and commissioning work.
- Interchangeable sensor options for different dew point ranges.
- Fast response for compressed-air dryer checks.
- Clear local display for field diagnosis and reporting.
- Accuracy (Dew Point)
- +/- 2 C Td (+20 ... -60 C Td); +/- 3 C Td (-60 ... -100 C Td)
- Measurement Range (Dew Point)
- 305A: -60 ... +60 C Td; 305B: -110 ... +20 C Td
- Measurement Range (Temperature)
- -40 ... +100 C
- Measurement Range (Pressure)
- 0 ... 1.7 MPa(a)
Measurement Parameters
- Dew point range
- -110 ... +60 C Td by model
- Application
- Compressed air and industrial gas
- Output
- Display, alarm and portable inspection options
Sensor Comparison
| Factor | MT-P | MT-A | MT-Q |
| Sensor Type | Polymer Capacitive Sensor | Aluminum Oxide Sensor | QCM Sensor |
| Applicable to > -60 Ctd | Yes | ||
| Applicable to -80 ... -40 Ctd | Yes | ||
| Applicable to -120 ... -60 Ctd | Yes |
Compare Dew Point Meter Models
Dew point Meter with Alarm Function M191x
SKUM191x
- Accuracy (Dew Point)
- +/- 2 C Td (+20 ... -60 C Td); +/- 3 C Td (-60 ... -100 C Td)
- Measurement Range (Dew Point)
- 191A: -60 ... +60 C Td; 191B: -80 ... +20 C Td; 191C: -110 ... +20 C Td
- Measurement Range (Temperature)
- -40 ... +100 C
- Measurement Range (Pressure)
- 0 ... 25 MPa(a)
Portable Dew Point Meter M305x
SKUM305x
- Accuracy (Dew Point)
- +/- 2 C Td (+20 ... -60 C Td); +/- 3 C Td (-60 ... -100 C Td)
- Measurement Range (Dew Point)
- 305A: -60 ... +60 C Td; 305B: -110 ... +20 C Td
- Measurement Range (Temperature)
- -40 ... +100 C
- Measurement Range (Pressure)
- 0 ... 1.7 MPa(a)
Dew Point Range
Select the sensor range around the expected lowest dew point, normal operating point and startup conditions so the instrument has enough measurement margin.
Gas Pressure and Sampling
Confirm line pressure, sample pressure, flow through the sampling cell and filtration needs before choosing a portable or fixed installation.
Response Time
Fast response matters for dryer checks, switching systems and maintenance rounds, while stable continuous monitoring can prioritize repeatability and alarm behavior.
Output and Alarm Needs
Display, relay, analog output and communication requirements determine whether a compact meter, alarm model or integrated monitoring package is the better fit.
Maintenance Review
Review calibration interval, sensor protection, contamination risk and installation access so the dew point meter remains reliable in daily operation.
Need help choosing the right configuration?
Share the process medium, flow range, pressure, temperature and installation limits. MeasFlow will help compare the practical options.