The Omron 61F-GP-N8L-4KM AC120 is a High/Low Level controller from the 61F series, designed for conductive liquid level detection. It operates on a 120VAC supply and outputs via a SPDT (2 Form C) relay rated at 3A @ 250VAC. Sensitivity is adjustable from 0 to 0.5 kOhm, which means it can detect liquids with conductivity as low as that range — useful for distilled water or low-conductivity process fluids where standard probes might not trigger. The controller can be mounted up to 4 km from the sensing electrodes, making it suitable for remote tank farms or distributed water/wastewater systems where the control panel sits far from the vessel. Termination is via an 8-pin octal plug-in base (socketable), so replacement is a pull-and-swap without rewiring — a clear advantage for MRO spares on existing panels.

Omron 61F-GP-N8L-4KM AC120 Level Controller, 120VAC, 4km Ran
Omron 61F series, High/Low Level controller, 61F-GP-N8L-4KM AC120, 120VAC supply, SPDT relay output, 0~0.5kOhm sensitivity, 4km max sensor distance, socketable 8-pin octal base.
Specifications
| Parameter | Value |
|---|---|
| Series | 61F |
| Parameter | Value |
|---|---|
| Contact form | SPDT (2 Form C) |
| Contact rating at voltage | 3A @ 250VAC |
| Parameter | Value |
|---|---|
| Supply voltage range | 120VAC |
| Parameter | Value |
|---|---|
| Type | High/Low Level |
| Parameter | Value |
|---|---|
| Mounting type | Socketable |
| Termination style | Plug In, 8 Pin (Octal) |
| Parameter | Value |
|---|---|
| Operating temperature range | -10°C ~ 55°C |
| Parameter | Value |
|---|---|
| Weight | 0.342 lb (155.13 g) |
| Output signal | Relay |
| Sensitivity | 0 ~ 0.5kOhm |
| Distance - control to sensor | 4km |
Product details
Frequently asked questions
What is the closest pin-compatible alternative to 61F-GP-N8L-4KM AC120 in this component family?
Within the Omron 61F series, other models with the same 8-pin octal base and SPDT relay output but different supply voltages (e.g., 24VAC/VDC or 240VAC) are pin-compatible. The sensitivity range and max sensor distance may differ — verify the specific model's ratings.
What is 61F-GP-N8L-4KM AC120's listed type (High/Low Level) on this component line?
The type is High/Low Level, meaning it can control fill and drain operations based on two probe levels.
What is 61F-GP-N8L-4KM AC120's listed series (61F) on this component line?
It belongs to the Omron 61F series of conductive level controllers.