2400AT Datasheet PDF - Systemsensor advanced ideas.

Specifications
    Size: Diameter: 5.5 inches (140 mm)
    Height: 3.19 inches (81 mm); add 0.5 inches (13 mm) for thermal units
    Weight: 0.7 lb. (310 g)
    Air Velocity: 3000 ft/min (15 M/s)
    Operating Temperature: 0° C to 38°C (0° to 100°F)
    Operating Humidity: 10% to 93% Relative Humidity, noncondensing
    Visual Indicator: Solid State LED
    Latching Alarm: Reset by Momentary Power Interruption
    Audible Signal: 85dBA minimum interrupted tone when in alarm
                               or supply voltage polarity is reversed
    Fixed Temperature Thermal: 135°F (57°C)