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Fiso NORTECH Sentinel

Power Transformer Signal Conditioner

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Key Features
  • 1 - 6 simultaneous channels
  • Non volatile memory
  • Up to 225ºC
  • Analog outputs
  • Six relays
  • RS-232 interface with modem capability
  • RS-485 for multiple sigal conditioner networking
  • Large and easy to read display
  • Compact and robust

Designed for direct, real-time temperature monitoring in power transformers

Specifically designed for direct, real-time temperature monitoring in power transformers. The Nortech is a flexible, multi-channel fiber optic signal conditioner. The Nortech provides up to six points of measurements per signal conditioner with the capability of networking 32 Nortech signal conditioners together, providing up to 192 channels. Readings can be transferred through its analog output, RS-232, or RS-485. Event relays help manage alarm occurrences and its multiple data logging features provide all the critical information required in high-power transformer monitoring applications.

  • Number of channel : 1 to 6
  • Sampling rate : 0.1 Hz
  • Reading Temperature range: -40°C to +225°C (-40°F to 437°F)


Number of channels 1 to 6, up to 192 with the modular networkability
Reading temperature range -40 to 225ºC
Resolution 0.1ºC for analog and digital output (1ºC displayed)
Conditioner accuracy¹ ±1 º
Sampling rate User configurable from 10 sec. and more. Internal 1- sec. sampling rate used to detect all events and control relays
Display Large 1.56 cm (0.614”) LED display for each channel
Networking From 1 to 32 units totalizing from 1 to 192 channels
Computer interface RS-232 and RS-485
Software PC based Nortech Commander™ software for configuration and data logging
Data logging and statistic feature, built in
  • Megalogger™ long term data logging
  • Triggered Logger short term data logging
  • Event Logger event recording
  • EZ-Trend™ cumulative statistics for each channel
  • Delays with event set points
  • 6 form-C (SPDT) 3A, 24 VAC with user configurable set points
  • 1 form-C (SPDT) 3A, 24 VAC. Fail-safe "system fault" relay
  • Analog outputs 1 to 6 field selectable 4-20 mA or 0 - 10 V (other available)
    Operating temperature -20 to 60ºC
    Storage temperature -30 to 70ºC
    Power supply² 15 VCD switching power supply
    Optical source lifetime 40,000 hours MTBF under continuous use (≈ 20 years under normal operating conditions)
    Panel mount brackets Included standard
    Options 19" Rack Chassis or NEMA-4 enclosure
    Weight < 2.5kg
    Dimensions 30.48 x 20.32 x 7.62cm (12 x 8 x 3")

    ¹ - Total system accuracy (with TPT-32 probes): ±3 ºC

    ² - External power supply excluded

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