Portable Dew Point Meter

I. Product Overview

The Portable Dew Point Meter is a gas moisture content measuring instrument based on capacitive polymer sensing technology, used to measure the dew point temperature of gases quickly and accurately (unit: ℃ or ℉). The instrument complies with internationally accepted humidity measurement standards and features contamination resistance, fast response and high stability, making it suitable for instant measurement in industrial sites, laboratories and outdoor environments. Dew point is the temperature at which the water vapor in the air becomes dew when the temperature drops. When this temperature is below zero degrees Celsius, it is also called the frost point, at which water condenses into frost. Measuring the dew point temperature is critical for many industries and applications: it helps determine the water vapor content of the air and predict the temperature at which water vapor will condense into water under specific conditions.

II. Applications

It is widely used for gas moisture detection in the following fields:

1. Energy industry: trace moisture monitoring of natural gas pipelines, compressed air systems, gas storage tanks and transformers;

2. Power systems: moisture analysis of insulating gas in GIS equipment, SF₆ circuit breakers and power transformers;

3. Manufacturing: quality control of welding shielding gas, laser cutting gas and industrial drying gas;

4. Scientific research and laboratories: material dryness testing, humidity calibration of environmental chambers and monitoring of chemical reaction processes;

5. Aerospace: dew point detection of airborne gas systems and inert gas in fuel storage tanks.

III. Executive Standards

JJF 1272-2011 Calibration Specification for Resistance-Capacitance Dew-Point Hygrometers;

GB/T 11605-2005 Methods of Humidity Measurement — 6. Resistance and Capacitance Method;

DL/T 506-2018 Method for Measuring the Moisture Content of Insulating Gas in Sulfur Hexafluoride Electrical Equipment;

GB/T 27896-2018 Determination of Water Content in Natural Gas — Electronic Analysis Method.

IV. Product Features

1. Adopts a high-precision sensor of internationally well-known brand origin, with fast response and long-term reliable high-precision measurement;

2. ★ 7-inch color touch LCD screen with a graphical operation interface and one-key switching between Chinese and English interfaces;

3. ★ Supports simultaneous measurement and display of 9 parameters on the same interface: dew point (℃), temperature, pressure, atmospheric dew point, volume ratio (ppmv), mass ratio (ppmw), mixing ratio (g/kg), absolute humidity (mg/m³) and relative humidity (%);

4. ★ Automatic sensor calibration: the sensor probe automatically calibrates its zero point and automatically eliminates the systematic error introduced by zero point and drift, ensuring the accuracy of every measurement while eliminating the trouble of annual verification; the calibration interval is up to two years;

5. ★ Supports real-time curve display of dew point changes;

6. ★ Supports dew point and temperature calibration as well as pressure compensation;

7. Supports timed automatic data saving with a user-defined auto-save interval;

8. Automatic anti-condensation design (suitable for high-humidity environments); resistant to particulate contamination, oil vapor and most chemicals, and insensitive to flow rate changes;

9. Equipped with a stainless steel filter — durable and long service life;

10. Portable design with a self-resetting folding handle and adjustable support feet;

11. Built-in large-capacity lithium battery: a single charge guarantees more than 20 hours of continuous operation;

12. ★ Can store more than 100,000 historical records, with USB data export generating Excel reports;

13. ★ Wi-Fi networking function, supporting remote upgrade and maintenance.

V. Technical Parameters