Potter Fluid Level Sensor OFL-331CB (4420003) with Bracket
Know the level. Before it matters.
A float-style fluid level sensor that detects a preset liquid level when immersed and switches a Form C contact as the float moves, with an L-bracket for mounting.

You can't watch a liquid level around the clock.
A fluid level that rises or falls past a set point often goes unnoticed until it becomes a problem. A level sensor gives your system a contact signal at the point you choose.
Built for reliable level sensing
The OFL-331CB pairs a Form C contact with a float-style design and a mounting L-bracket.
Detects preset level
Senses a preset liquid level when the sensor is immersed.

Lead length
The sensor includes a 20-inch, 22 AWG lead.
Form C contact
Gives both normally open and normally closed outputs, changing state as the float moves up or down.
Acetal resin housing
The switch housing is made of acetal resin, and the sensor is described as water and shock proof.
Leads included
Comes with a 20-inch, 22 AWG lead for connecting to your system.
Everything you need to know.
| Brand | Potter |
| Model | OFL-331CB |
| Product Type | Fluid Level Sensor |
| Contact Type | Form C, N.O./N.C. |
| Switch Housing | Acetal resin |
| Lead | 20-inch, 22 AWG |
| Contact Rating | 3 VA |
| Max. Carry Current | 0.5 A |
| Max. Switching Current | 0.2 A |
| Breakdown Voltage | 150 VDC |
| Operating Temperature | -4°F to 176°F (-20°C to 80°C) |
Potter Fluid Level Sensor OFL-331CB (4420003) with Bracket
The Potter OFL-331CB is a fluid level sensor from Potter Electric Signal: OFL-331C Fluid Level Sensor with Bracket (4420003). It is intended for security and fire-alarm installers, integrators and facility maintenance teams who need a genuine Potter part.
Key Features
- Water and shock proof
- Switch Housing: Acetal resin
- Contact Type: Form C N.O./N.C. – A changeover contact gives both normally open and normally closed outputs.
- Contact: 22 AWG 20” lead – Wire gauge accepted at the terminals or provided on the leads.
- Contact Rating: 3VA
- Max. Carry Current: .5Amp
- Max. Switching Current: .2Amps
- Breakdown Voltage: 150VDC
- Operating Temperature Range: -4°F-176°F-20°C-80°C – Defines the environmental range the device is rated to operate in.
Specifications
- Brand: Potter
- Model: OFL-331CB
- Product Type: Sensor Probe
- Additional Information: Water and shock proof; Fluid level sensor
Typical Uses
- Potter security system installations
- Replacement and service of existing Potter equipment
Please confirm the model, ratings and compatibility with your panel or system documentation before ordering, and install according to the manufacturer's instructions and local codes.
Need help with compatibility?
Looking for a manufacturer part number, compatible replacement, or quantity order? Contact Raztechs for sourcing and quote support.

Potter OFL-331CB, ready to order.
- Product Type: Fluid Level Sensor
- Contact Type: Form C, N.O./N.C.
- Switch Housing: Acetal resin
- Lead: 20-inch, 22 AWG
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