The HOFFMAN & LAMSON Analog Meter Relay monitors motor amperage and airflow and automatically shuts down the blower motor when amperages fall outside the designated operating range.
Our Meter Relay is available in a single setpoint configuration for low amp set point surge monitoring or a dual set point for low and high amps surge and overload setpoint monitoring.
For blower vibration monitoring, a single Vibration Switch is available for mounting on the blower housing or bearing. When alarmed, contacts contained in the switch open (or close).