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Valco - Adjustable Level Switch For Liquids, Vertical Mount - R1 Series

  • 500 and 1000 mm. tube length. Self adjustable
  • St. Steel stem, Brass connection, Spansil float
  • Working pressure up to 20 bar
  • Working temperature up to 120°C
  • Reed switch SPST or SPDT operation

Product description

ADJUSTABLE level control for the monitoring of liquids both in  industrial and civil environment. Proposed in 2 standard versions of  rod length, all intermediate lengths are obtained by the user simply shortening the rod of the float.


The principle of operation of these instruments is based on the drive of a reed switch, located in the head of the instrument, as a result of the hydrostatic thrust exerted by the liquid on the float. The absence of moving parts guarantees extreme ruggedness and a limited need for maintenance

Part numbers

Parts Price Length Manufacturer part no. Process connection
500 mm R1.B77.4.0500.S.25GB.S1.L.1.I2 G1
1000 mm R1.B77.4.1000.S.25GB.S1.L.1.I2 Flange
500 mm R1.B77.4.0500.S.FBPX.S1.L.1.I2 G1
1000 mm R1.B77.4.1000.S.FBPX.S1.L.1.I2 Flange


500mm length, G1", Brass/SS/ABS, NC, DIN, Max 10 bar

Technical data

Current 1.3A
Electrical connection DIN A 43650
Function N/O & N/C
IP class IP65
Length 500 mm
Manufacturer part no. R1.B77.4.0500.S.25GB.S1.L.1.I2
Material of connection Nickel-plated brass
Material of float SPANSIL
Material of seals NBR
Mounting Vertical
Pressure max 10 bar
Process connection G1
Specific gravity 0.4
Temperature operational max 105 °C
Voltage 250V

Measurements and connections


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