# RBXGU Series Micro Flow Ultrasonic Sensor

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> R&B Instrument Inc..

## Facts

- **Model:** RBXGU
- **Category:** Ultrasonic Flow Meter
- **Canonical page:** https://www.rbflowmeter.com/products/rbxgu-micro-flow-ultrasonic-sensor
- **Language:** en
- **Last updated:** 2026-10-18
- **Brand:** R&B Instrument Inc.

## Overview

Inline ultrasonic micro-flow sensor measuring 1–100 mL/min with millisecond response, no moving parts and a biocompatible PEEK fluid path.

## Description

### Product Overview

The RBXGU is an inline ultrasonic micro-flow sensor for analytical, medical and dosing applications where flows are measured in millilitres per minute. Time-difference technology delivers 0.05 mL/min resolution with millisecond-level response, so pulsed spray and start-stop cycles are captured accurately.

A biocompatible PEEK fluid path with Viton seals and integrated circuitry make the RBXGU a compact, clog-free alternative to gear and turbine micro-flow instruments.

## Specifications

| Parameter | Value |
| --- | --- |
| Flow range | 1–100 mL/min (models up to 0–3000 mL/min) |
| Accuracy | ±1% of reading (>5 mL/min); resolution ±0.05 mL/min |
| Repeatability | ±0.1% FS |
| Temperature | Liquid 0–90°C; ambient 0–60°C |
| Output signal | RS485; pulse; current/voltage; digital (NPN/PNP/push-pull); flow switch |
| Power supply | 12–30 VDC, <20 mA |
| Connection | NPT thread, U-tube body |

## Key specifications

- Accuracy: ±1% of reading (>5 mL/min), resolution ±0.05 mL/min
- Pipe size: NPT thread (PVC/silicone/PE/PUR tubing)
- Output signal: RS485, pulse, current/voltage, digital (NPN/PNP/push-pull), flow switch

## Features

- Ultra-high resolution of 0.05 mL/min.
- Millisecond-level response for pulsed spray and start-stop cycles.
- No moving parts; no clogging, no mechanical wear.
- Biocompatible PEEK fluid path with Viton seals.
- Bubble detection, flow switch, quantitative filling, bidirectional volume.
- Integrated circuitry; no external processing system required.

## Contact

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