Choosing the right Ringbalance differential pressure instrument
The Rixen Messtechnik Ringbalance range is built around a mechanical measuring principle for very low differential pressures, but each product has a different role. Selecting the correct instrument depends on whether the application requires local indication only, remote signal output, controller functionality or hazardous-area approval.
- RW65: Choose this for local analogue indication of low draft, pressure, differential pressure or flow.
- MU-Digital: Choose this when an LCD display and standard analogue outputs are required.
- MU-Analog-65: Choose this when local analogue indication and transmitter output are both required.
- Rixotact_4: Choose this when low-pressure measurement and three-point step control are required.
- RW65_EX_II: Choose this for intrinsically safe hazardous-area pressure monitoring.
How the Ringbalance principle supports low-pressure measurement
Rixen Messtechnik Ringbalance instruments use a mechanical measuring principle for small pressure differences. The measuring system is based on a partially filled ring body, fixed geometry and a calibration weight, rather than a conventional spring or diaphragm arrangement.
When differential pressure is applied, the ring body rotates and converts a small liquid-level shift into a readable angular movement. This mechanical amplification helps very low pressure differences to be displayed clearly at the instrument, with selected models also converting the measured value into an electrical output or controller function.
Why choose a Ringbalance instrument?
A Ringbalance instrument is particularly useful where very low pressure differences need to be read locally, configured to suit the application, or integrated into a wider control or monitoring system.
- Mechanical indication: Local display can be read directly at the instrument
- Low-pressure measurement: Suitable for small spans from 40 Pa upwards
- Configurable ranges: Measuring span and scale unit can be matched to the application
- Output options: Selected models provide transmitter, controller or intrinsically safe output functions
- Application flexibility: Suitable for cleanroom, HVAC, furnace, biogas and hazardous-area pressure duties
Typical applications
Rixen Messtechnik Ringbalance instruments are used where small pressure differences affect safety, product quality, process stability or energy efficiency. Typical applications include cleanroom pressure cascades, HVAC and filter monitoring, ventilation systems, furnace and combustion draft measurement, biogas and anaerobic digestion pressure monitoring, building automation and hazardous-area differential pressure measurement.
In many of these applications, choosing the correct measuring range is as important as selecting the product type. Able Instruments can help review the pressure range, scale unit, output signal, controller function, overload protection and installation environment before quotation.
Product selection at a glance
| Product | Instrument Type | Choose When | Key Output or Function |
|---|
| RW65 | Analogue indicator | You need local low-pressure indication only | No power required for local indication |
| MU-Digital | LCD transmitter | You need a digital local display with remote signal output | 4–20 mA, 0–20 mA and 0–10 V |
| MU-Analog-65 | Analogue display transmitter | You need an analogue display with transmitter output | 4-wire or 2-wire loop-powered options |
| Rixotact_4 | Differential pressure controller | You need low-pressure measurement with active control | Three-point step control and 0–10 V output |
| RW65_EX_II | Intrinsically safe ATEX gauge | You need hazardous-area low-pressure monitoring | Passive 4–20 mA output for Ex-zone applications |
Support selecting Rixen Messtechnik instruments
Able Instruments are Rixen Messtechnik’s Exclusive Representative for Sales and Service in the UK and Ireland. We can support customers with product selection, application review, measuring range selection, scale units, output signals, supply voltage, controller requirements, limit contacts, overload protection and hazardous-area configuration.
Correct specification is especially important for low-pressure applications because the measuring range, signal output and installation environment can affect both performance and suitability. If you are unsure which Rixen Messtechnik instrument is best suited to your application, Able Instruments can review the requirement before quotation.
Ringbalance Differential Pressure Instruments – Frequently Asked Questions
What is a Ringbalance differential pressure instrument?
A Ringbalance differential pressure instrument is a mechanical differential pressure instrument designed for very low pressure differences. Depending on the model, it can provide local analogue indication, transmitter output, controller functionality or intrinsically safe hazardous-area pressure monitoring.
Which Ringbalance instrument should I choose for local indication only?
For local indication only, the RW65 is the appropriate starting point. It provides analogue indication for low draft, pressure, differential pressure and flow measurement, without requiring electrical power for local reading.
Which Rixen Messtechnik product provides transmitter outputs?
The MU-Digital and MU-Analog-65 provide transmitter outputs. MU-Digital uses an LCD display and standard analogue outputs, while MU-Analog-65 combines a large analogue scale with transmitter output, including 4-wire and 2-wire loop-powered options.
Which Rixen Messtechnik product is used for pressure control?
Rixotact_4 is the controller product in the range. It combines Ringbalance differential pressure measurement with integrated three-point step control and a 0–10 V transmitter output.
Which Rixen Messtechnik product is suitable for hazardous areas?
RW65_EX_II is the intrinsically safe ATEX Ringbalance differential pressure gauge for hazardous-area applications, including gas and dust Ex zones. Hazardous-area classification and signal integration requirements should always be reviewed before quotation.
Can Able Instruments help select and configure Rixen Messtechnik instruments?
Yes. Able Instruments can help review the required pressure range, scale unit, output signal, supply voltage, control function, overload protection and hazardous-area requirements to support correct product selection and configuration.
