OMRON 61F-G Floatless Level Switch with 61F-11 Relay Unit | 110/220VAC

OMRON 61F-G Floatless Level Switch with 61F-11 Relay Unit (110/220VAC)

The industry standard for automated conductive liquid level management is the OMRON 61F-G Floatless Level Switch. Designed as a full-building-block controller, this unit includes the plug-in 61F-11 Relay Unit. It operates on a dual-selectable 110/220VAC power supply at 50/60Hz. It removes the possibility of mechanical jam-ups, fouling and corrosion by using heavy-duty electrode sensing in place of mechanical floats. It’s perfect for tough maritime, industrial and municipal plumbing infrastructures.

Product Details:

• Manufacturer: OMRON Corporation
• Model Designation: 61F-G
• Included Components: 1x 61F-G Controller Base, 1x 61F-11 Plug-in Relay Unit
• MPN (Manufacturer Part Number): 61F-G AC110/220

Technical Specifications

Applications

1. Automated Water Supply & Drainage Control: Controls high/low set points of overhead tanks, water sumps, and underground storage reservoirs.
2. Marine Bilge and Ballast Automation – Monitors grey water, fresh water and bilge accumulation in all types of maritime hulls (not applicable for combustible hydrocarbons).
3. Boiler Feedwater Regulators: Controls precise, consistent liquid margins in low pressure industrial boilers and heat exchangers.
4. Wastewater Treatment Systems: Controls lift stations, mixing tanks and chemical dosing reservoirs that manage conductive effluents.

Part Number Cross-References

• OMRON 61F-G AC110/220
• OMRON 61F-G-AC110/220VAC
• OMRON 61F-11 (Replacement Relay cartridge only)

Lead Time & Shipping Information

• Dispatched Within: 1–2 business days for in-stock configurations.
• Worldwide Express Delivery: Available via DHL, FedEx, and UPS. Expedited airfreight available for critical AOG (Aircraft on Ground) or Vessel-Down scenarios.

Installation Guide:

1. Eliminate Electrolysis via AC: Ensure you use the genuine 61F-11 relay unit included in this kit. The controller uses alternating current (AC) across the electrode rods. Never substitute or modify the circuit with DC current, as DC causes rapid galvanic accelerated corrosion and scaling on the stainless steel probes.
2. Mitigating High-Vibration Chattering: In high-vibration zones (like ship engine rooms or close to heavy reciprocating pumps), standard water sloshing creates contact chattering. Always configure the system with a 3-pole electrode layout (E1, E2, E3) to utilize the self-holding circuit function. This sets an explicit high/low boundary buffer, preventing your pumps from cycling repeatedly on and off.
3. Shielding Long Cable Runs: If your control panel is located on the main deck and the tank is deep in the double-bottom holds (approaching distances over 100 meters), run the electrode lines within a dedicated, shielded conduit. This eliminates parasitic capacitance from adjacent high-voltage machinery cables, preventing false-positive relay trips.