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Floatless Relay, 51F Series

Floatless Relay, 51F Series

Highly reliable electrode type surface relay that electronically detects and manages surface changes. Compact plug-in type.

· High consumption relay substrate is easy to do replacement work on during maintenance due to the adoption of the unit method.
· Power, operation can be easily viewed with 2-color LED display.
· All varieties can be mounted with IEC rail mounting.
· High sensitivity, long distance models also available.
· Compact plug-in type comes with LED lamp.


Japanese Only

Part Number

Configured Part Number is shown.

Part Number
Part NumberVolume DiscountDays to ShipSensitivity Ambient Operating Temperature
Output contact capacity
11 Day(s) or more Standard-10 to 55250 VAC 3A (Resistor Load), 250 VAC 2A (Conductor Load)
40 Day(s) or more High sensitivity-10 to 55250 VAC 3A (Resistor Load), 250 VAC 2A (Conductor Load)
40 Day(s) or more Long Distance Type-10 to 55250 VAC 3A (Resistor Load), 250 VAC 2A (Conductor Load)


  1. 1

Basic Information

Application Liquid surface control Contact Configuration Other Terminal shape Socket / plug-in
Contact rated current (minimum value for AC and DC)(A) 3 Coil rated voltage (AC)(V) 250 Dimension height(mm) 60
Dimension width(mm) 39 Dimension depth(mm) 65 Type Electrolyte Type Level Relay
Specifications Compact Plug-In Type/ Compatible with Other Manufacturers' Products Features For Automatic (Waste) Water Supply Operations Rated power supply voltage 100 to 110/ 200 to 220 VAC 50/ 60 Hz

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