The Landtek DP29-SF6 Dew Point Meter is a precision instrument designed specifically for measuring the dew point of Sulfur Hexafluoride (SF6) gas. Built on the chilled mirror measurement principle, it ensures high-accuracy and repeatable dew point readings in gas-insulated equipment and testing environments.

This model is ideal for use in power substations, gas-insulated switchgear (GIS), laboratory SF6 systems, and SF6 handling operations requiring stable and reliable humidity control.

Now available across Pakistan including Karachi, Lahore, Islamabad, Sialkot, Faisalabad, and other major cities.

Key Features

• High-accuracy chilled mirror dew point measurement

• Specifically calibrated for SF6 gas humidity testing

• Stable performance with no need for frequent recalibration

• Built-in electronic sample gas flow monitor

• High measurement accuracy: ±0.2°C

• Repeatability: ±0.1°C

• USB and optional RS-232 digital data output

• Optional analog output: 4–20 mA or ±10 mV/°C

• Semiconductor refrigeration for efficient cooling

• Supports wide gas pressure and flow ranges

Applications

• SF6 gas humidity monitoring in power transmission and distribution

• Dew point testing in GIS systems and circuit breakers

• SF6 gas quality verification during refilling or recovery

• Industrial and laboratory applications involving high-voltage insulation gases

Other models in the series:

• DP29-40: For general air dew point applications

• DP29-60: Standard model for lab calibration and environmental chamber control

Technical Specifications

• Dew Point Range:
    - Under 0°C: -60°C
    - Under 10°C: -60°C
    - Under 20°C: -55°C
    - Under 35°C: -45°C

• Accuracy: ±0.2°C

• Repeatability: ±0.1°C

• Resolution: 0.1°C

• Default Output: USB

• Optional Output: ±10 mV/°C or 4–20 mA

• Measurement Principle: Chilled Mirror

• Refrigeration Method: Semiconductor Cooling

• Inlet Flow Rate: 15–60 L/h (Recommended: 30–40 L/h)

• Inlet Pressure: 10 mbar to 10 bar (1 kPa to 1 MPa)

• Response Time: Max 2°C/sec

• Power Supply: 220V AC ±10%, 50/60 Hz

• Power Consumption: Approx. 160W

• Operating Temperature: 0 to 50°C

• Humidity Range: <90%, non-condensing

• Dimensions: 342 × 140 × 326 mm

• Weight: Approx. 7.22 kg

Standard Accessories

• Main Unit

• Inlet Tube (FEP, 3 meters) with connector

• Instruction Manual

• Packaging Box

Optional Accessories:

• RS-232C Data Cable with Software

• External Gas Sampling Pump

Why Buy from Landtek Instruments Pakistan

• Official supplier of Landtek products

• Updated 2025 pricing

• Delivery in Karachi, Lahore, Islamabad, Sialkot, and all over Pakistan

• Original product with technical support and warranty

• Trusted by professionals in power utilities and testing labs.