Qualitrol 118 Intelligent Transformer Monitor

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Dry Type Transformer Monitor

The 118ITM is a dry type transformer monitor that tracks transformer temperature in real time, turns fans on when needed, and connects to your SCADA. It helps keep equipment online, safe, and efficient in plants, data centers, and renewable sites.

Why it’s trustworthy

Accurate in noisy rooms: The 118ITM’s noise-resistant design helps reduce EMI effects on thermocouple signals, so readings stay stable.
Tough sensors: Type K thermocouples handle vibration, temperature cycling, and mechanical stress. That makes them a strong choice for busy data centers and wind/solar sites.
Easy data sharing: Send data by analog outputs (4–20 mA, 0–1 mA, 0–5 V) or Modbus RTU (RS-485). This plugs into SCADA, historians, or cloud analytics to power predictive maintenance—trend temperatures, set alerts, and catch issues early.

Key Features

Real-time temperature on three windings for safer, steadier operation.
Accurate in noisy rooms — design helps reduce EMI effects on readings.
Intelligent fan control to cut heat and save energy.
Alarm and trip outputs to prevent damage when limits are reached.
Easy to use front panel with display, buttons, and status LEDs.
Connects to your systems for SCADA/BMS and analytics (enables predictive maintenance).
Rugged and compact for harsh sites; CE, UL, CSA certified.

Quick Tech Specs

Sensors: Three Type K thermocouples (one per winding)
Accuracy / Range: ±3 °C, typical 0–250 °C
Outputs: 0–1 mA, 0–10 mA, 0–20 mA, 4–20 mA, 0–5 V (selectable)
Communications: Optional Modbus RTU (RS-485) for SCADA / data platforms
EMI handling: Transient suppression (ANSI 37.90a-1989) to keep readings stable
Environment: −30 °C to +72 °C; 10–90% RH (non-condensing)
Ruggedness: Vibration 50/180 Hz @ 0.004″; shock 10 G (3 axes)
Power: 80–300 VAC (50/60 Hz) or 40–280 VDC, <10 W