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KT‑200 Online Oil Moisture Transmitter

The KT-200 is a fast, reliable, and accurate online transmitter for measuring water activity (aw) in oil and temperature (T). Designed for OEM integration, it features a rugged stainless-steel housing and excellent performance even in demanding industrial environments.

It is ideal for continuous monitoring of lubrication, hydraulic, and insulation oils, enabling proactive maintenance and ensuring the long-term reliability of critical equipment such as transformers and heavy machinery.

Key Features

  • Continuous measurement of water activity in oil and temperature

  • Converts moisture readings into ppm values for transformer oil

  • Accurate, stable, and robust design under hostile environments

  • Supports convenient local & remote calibration

  • Excellent pollution and pressure resistance

  • Compact, lightweight design for easy integration

  • Provides both analog and digital signal outputs

Technical Specifications

Water Activity Measurement

  • Range: 0 … 1 aw

  • Accuracy:

    • 0 … 0.6: ±0.02

    • 0.6 … 1: ±0.03

  • Response time: <1 min (typical)

Water in Oil Measurement

  • Range: 0 … 100 ppm (mineral transformer oil)

  • Accuracy: ±10% or 10 ppm (max)

Temperature Measurement

  • Range: –40°C to +120°C

  • Accuracy (at +25°C): ±0.3°C

  • Working temperature: –40°C to +80°C

  • Storage temperature: –40°C to +80°C

  • Oil temperature: –40°C to +120°C

Outputs

  • Digital: RS485 MODBUS, RS232 (optional)

  • Analog: 4–20 mA (resistive load ≤500 Ω)

Electrical & Mechanical

  • Housing: 304 stainless steel

  • Weight: 220 g (transmitter), 270 g (package)

  • Dimensions: 172 × 117 × 53 mm

  • Protection: IP66

  • Mechanical connections: G 1/2″ ISO or 1/2″ NPT

  • Pressure range: ≤100 bar

  • Resistance load: 250–500 Ω

  • Supply voltage: DC 9–36 V, >DC15 V (for 4–20 mA)

  • Cable: M8 6-pin, length 2 m

Standards Compliance

  • CE certified

  • EN61326-1 / EN61326-2-3

  • ICES-003 Class B

Options & Accessories

  • Stainless steel filter

  • USB-RS485 converter

  • USB-RS232 converter

  • Seal washer (ISO G1/2”)

  • Connecting cables:

    • 5 m, M8 screw thread, 90° bend angle

    • 10 m, M8 screw thread, 90° bend angle

    • 2 m, M8 screw thread, with LED light

  • PC software: OW600

  • KT-200D display & control unit (optional)

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