BTM-Series Battery Temperature / Thermal Runaway Monitor

Eagle Eye
Product Type


The Eagle Eye BTM-Series Battery Temperature Sensor/ Thermal Runaway Monitor is a dependable low-cost solution to protecting stationary batteries against over-temperature and thermal runaway conditions. Individual sensors are quickly and securely attached to each battery jar and connected in series from the main unit. Each thermal runaway sensor is sealed to an IP68 rated-enclosure (water, gas and dustproof) and the provided special gel-filled connectors are also sealed against acid ingress, dust, and gasses. 

    • Alarm Range Activation at 35 °C (95 °F), ± 3 °C (5 °F)
    • Reinstatement Temp 2 °C (3.5 °F) below activation temperature
    • Input Voltage DC 12V 2-pin connectors or 12V AC/DC wall adapter
    • Output Relays (2) SPDT volt-free contact relays
    • Output relay contact ratings: 7A at 240 VAC, 10A at 120 VAC
    • Dimensions
    • (L x W x D) Monitor: 84 x 40 x 77 mm (3.3 x 1.6 x 3 in.)
    • Sensor: 38 x 20 x 10 mm (1.5 x 0.8 x 0.4 in.)
    • Cables: 300 mm (11.8 in.)
    • Compliance IFC 2015 – 608.3, NFPA 1 – Article 53.3.2
    • Monitor individual unit temperatures for thermal runaway conditions
    • Simple fail-safe change-over relay alarm interfaces
    • Bright LEDs pinpoint individual overtemperature cells
    • No special tools required for installation
    • Sensor circuit break detection
    • Alarm on power supply failure (fail-safe)
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