Description

The model BLR reed sensors are used for continuous monitoring and recording of the liquid level in connection with transmitters. They work on the float principle with magnetic transmission (permanent magnet, reed switch and resistance measuring chain) in a 3-wire potentiometer circuit.

A magnetic system built into the float actuates, through the walls of the bypass chamber and of the sensor tube, reed contacts at a resistance measuring chain (potentiometer). The measurement voltage generated by this is proportional to the fill level.

The resistance measuring chain is made up from reed contacts and resistors soldered onto a PCB. Depending on requirements and design several different contact separations from 5 to 18 mm are available.

For selecting the optimum sensor (sensor model, connection housing, electrical connection, sensor tube (material and total length), contact separation, head-mounted transmitter, measuring range, approval) we offer application-related technical advice.

Applications

• Sensor for continuous level measurement of liquids in bypass level indicators
• Chemical and petrochemical industries, oil and natural gas extraction (on- and offshore)
• Shipbuilding, machine building
• Power generating equipment, power plants
• Pharmaceutical, food, water treatment, environmental engineering industries

Special features

• Installation of head-mounted transmitters in the connection housing possible
• Various contact separations selectable
• Programmable and configurable head-mounted transmitters for field signal 4 ... 20 mA, HART®, PROFIBUS® PA or FOUNDATION™ Fieldbus
• Explosion-protected versions
• Temperature ranges from -100 … +350 °C