Brooks Instrument 028K001AAA Reed Switch Alarm

Brooks Instrument 028K001AAA Reed Switch Alarm is an optional signaling accessory for the MT3750 series armored flowmeters, delivering a normally open, latching reed switch actuated by a magnet embedded in the float to indicate when flow moves outside a set point. Designed to pair with Brooks MT3750 flowmeter assemblies, it signals through an external relay for robust operation and can be configured across the meter’s full flow range using jumper settings on the alarm circuit board and by adjusting the sensor bracket. Key electrical specs define a maximum voltage of 124 VAC or 175 VDC, a maximum current of 250 mA, and a maximum contact rating of 3 Watts; the reed switch itself is rated for relatively low current, making external relay hardware the recommended interface. The alarm point can be set to trigger at low or high flow and remains latched until the float crosses the opposite threshold, with an approximate 8 mm switching hysteresis, enabling reliable notification of flow deviations in laboratory or process environments. This combination — the 028K001AAA reed switch alarm with the MT3750 flowmeter — provides an integrated solution for monitored flow where precise, discrete alerts are essential.