# RBDM Insertion Tuning Fork Density Meter

> Machine-readable summary of https://www.rbflowmeter.com/products/rbdm-insertion-tuning-fork-density-meter — generated from the same product record the HTML page renders.
> R&B Instrument Inc..

## Facts

- **Model:** RBDM
- **Category:** Insertion Fork Density Meter
- **Canonical page:** https://www.rbflowmeter.com/products/rbdm-insertion-tuning-fork-density-meter
- **Language:** en
- **Last updated:** 2026-10-18
- **Brand:** R&B Instrument Inc.

## Overview

All-welded insertion density meter using tuning fork technology for continuous, high-accuracy liquid density measurement in pipelines, bypass loops and tanks.

## Description

### Product Overview

The RBDM measures liquid density by direct insertion through a flange or thread — no bypass loop is required. Tuning-fork technology is unaffected by pressure, temperature or flow fluctuations, and handles slurries, high-viscosity liquids and corrosive chemicals.

The all-welded sensor is available in 316L, Hastelloy or PFA/PTFE-coated wetted parts, with a built-in PT100 providing simultaneous density and temperature output.

## Specifications

| Parameter | Value |
| --- | --- |
| Installation | Direct insertion via flange or thread; no bypass required |
| Accuracy | ±0.001–0.002 g/cc (±1–2 kg/m³); optional ±0.5/±1/±2 kg/m³ |
| Pressure | 10–20 MPa max; 1.6 / 4.0 MPa options; ANSI 150–1500 RF |
| Temperature | -20 ~ +150°C (optional -50 ~ +150°C) |
| Output signal | 4–20 mA + 0–1 kHz + RS485 Modbus RTU; HART/Profibus PA/FF optional |
| Power supply | 24 VDC ≥500 mA (220 VAC optional) |
| Protection | IP65 (IP66/IP67 optional) |
| Connection | Flange/thread; ANSI, DIN, HG/T, triclamp, IDF/RJT |

## Key specifications

- Accuracy: ±0.001–0.002 g/cc (±1–2 kg/m³)
- Pipe size: > DN150 (process connection DN50 RF etc.)
- Output signal: 4-20mA + 0–1 kHz + RS485 Modbus RTU (HART/Profibus PA/FF optional)

## Features

- Direct insertion via flange or thread; no bypass required.
- Unaffected by pressure, temperature or flow fluctuations.
- Handles slurries, high-viscosity liquids and corrosive chemicals.
- All-welded sensor with 316L, Hastelloy or PFA/PTFE coating.
- Simultaneous density and temperature output via built-in PT100.
- Minimal maintenance and reduced operating cost.

## Contact

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