# RBXEF-OP Open Channel Electromagnetic Flow Meter

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> R&B Instrument Inc..

## Facts

- **Model:** RBXEF-OP
- **Category:** Electromagnetic Flow Meter
- **Canonical page:** https://www.rbflowmeter.com/products/rbxef-op-open-channel-magnetic-flow-meter
- **Language:** en
- **Last updated:** 2026-10-18
- **Brand:** R&B Instrument Inc.

## Overview

Open-channel electromagnetic flow meter using area-velocity measurement for reliable flow and level data in sewage, stormwater and irrigation channels.

## Description

### Product Overview

The RBXEF-OP measures open-channel and partially-filled pipe flow by combining electromagnetic velocity sensing with dual ultrasonic and hydrostatic level measurement. It is built for sewage, stormwater and irrigation channels where sediment, bubbles and debris defeat conventional instruments.

Ultra-low velocity sensitivity down to 0.01 m/s and IP68 submersible sensors make it suitable for flooded sewers and remote, unattended sites with solar or battery power.

## Specifications

| Parameter | Value |
| --- | --- |
| Diameter | Pipe DN100 – DN6000; channel width up to 6 m |
| Accuracy | Velocity 1.0%; level 0.5%; system error 2.5% |
| Velocity | Down to 0.01 m/s |
| Temperature | Ambient -10°C ~ +60°C |
| Output signal | RS485/Modbus; optional GPRS/4G/5G, 4–20 mA, alarm |
| Power supply | AC 220V/110V, DC 12V, 3.6V battery, optional solar |
| Protection | IP68 (sensors); IP65 (transmitter) |

## Key specifications

- Accuracy: Velocity 1.0%, level 0.5%, system 2.5%
- Pipe size: DN100 ~ DN6000 (channel width up to 6 m)
- Output signal: RS485 Modbus, 4-20mA, alarm (GPRS/4G/5G optional)

## Features

- Electromagnetic velocity sensing; immune to sediment, bubbles and debris.
- Ultra-low velocity sensitivity down to 0.01 m/s.
- Dual ultrasonic and hydrostatic depth sensors with redundancy.
- AC/DC/solar/3.6 V battery power for remote deployment.
- IP68 submersible sensors for sewer and flood-prone channels.
- RS485/Modbus plus optional wireless remote monitoring.

## Trade information

- Minimum order quantity: 1pc
- Lead time: in 10 workdays
- HS code: 90261000

## Contact

For pricing, lead time and customization, contact R&B Instrument Inc. via the product page above.