Rosemount 2120 12V vibrating fork level switch

Emerson Process Management has announced a 12 VDC DPDT relay version of its Rosemount  2120 vibrating fork level switch for automated level monitoring and overspill protection of tanks or vessels in remote locations. The switch is said to be the first low-power switch to provide a built-in relay output - eliminating the need for a separate switching relay.

The 12 V switch is ideally suited to installations where there is no access to normal 24 V power supplies and the only power available is from batteries or solar-charged systems. The switch has all the features of the standard versions, including built-in instrument health/self-checking diagnostics, but is designed for use in 12 V low-power circuits.

Based on vibrating short fork technology, the switch is suitable for virtually all liquid applications and is unaffected by flow, turbulence, bubbles, foam, vibration or product variations. The `fast-drip’ fork design provides quicker and more reliable detection, especially in high-density liquids. Electronic self-checking and condition monitoring with heartbeat LED also give status and health information on the fork and sensor.

An adjustable switching delay virtually eliminates the risk for false switching in turbulent or splashing applications and the range includes various housings and wetted parts materials, with a complete range of process connections, extended fork lengths and overfill approvals.

With a temperature range up to 150°C and pressures up to 100 bar-g, the switch is suited to harsh process conditions including hazardous area installations.