- Exclusive UK and Ireland Rixen Messtechnik representative
- Guidance selecting the correct low-pressure range
- Output, supply and overload option guidance
Rixen Messtechnik MU-Digital Ringbalance Differential Pressure Transmitter
Digital Ringbalance transmitter for low draft, pressure and differential pressure measurement with standard analogue outputs for control system integration.
Key highlights
- Digital transmitter: LCD display with standard analogue output signals
- Control integration: 4–20 mA, 0–20 mA and 0–10 V outputs as standard
- Low-pressure ranges: Configurable for draft, pressure and differential pressure duties
- Local verification: 3½-digit LCD supports commissioning and on-site checks
- Selectable supply: 24 VAC, 110 VAC, 230 VAC or 24 VDC selected at order
- Factory calibrated: Factory calibration certificate included
The Rixen Messtechnik MU-Digital is a Ringbalance differential pressure transmitter with LCD display for low draft, pressure and differential pressure measurement. It is designed for applications where a stable local reading and standard output signals are required for connection to a control or monitoring system.
Using Rixen Messtechnik’s mechanical Ringbalance measuring principle, the MU-Digital combines low-pressure measurement with electronic signal transmission. The instrument provides 4–20 mA, 0–20 mA and 0–10 V outputs as standard, supporting integration with BMS, SCADA and building automation systems.
The MU-Digital is suited to cleanroom, ventilation and HVAC applications where low differential pressure signals are used for monitoring, control or verification. Its 3½-digit LCD display provides local indication during commissioning and allows operators or maintenance teams to carry out quick checks at the instrument.
Measuring range, display unit and supply voltage are selected at order. Available units include Pa, kPa, daPa, mbar, mmWS, mmCE and in.W.C., while supply options include 24 VAC, 110 VAC, 230 VAC and 24 VDC.
For applications where pressure spikes or abnormal overload conditions may occur, the MU-Digital can be specified with DZ overload protection options. Correct range, unit, supply and overload protection selection should be reviewed before ordering, as these details form part of the configured instrument.
Key Features
- Digital Ringbalance transmitter: Converts draft, pressure and differential pressure into standard analogue output signals for remote monitoring or control.
- Standard signal outputs: Provides 4–20 mA, 0–20 mA and 0–10 V outputs for integration with BMS, SCADA and building automation systems.
- LCD local indication: 3½-digit LCD display with 12.5 mm character height supports commissioning checks and local verification.
- Configurable low-pressure range: Measuring range is selected to suit the application, with available ranges from 0…40 Pa to 0…1.8 kPa.
- Selectable display units: Units include Pa, kPa, daPa, mbar, mmWS, mmCE and in.W.C. to align with site or project requirements.
- Power supply options: Available with 230 VAC, 24 VAC, 110 VAC, 120 VAC, 240 VAC or 24 VDC supply options.
- Factory calibration included: Supplied with a factory calibration certificate to support commissioning and project documentation.
- Overload protection option: DZ overload protection can be specified where pressure spikes or abnormal overload conditions may exceed standard limits.
Specifications
| Measurement | |
| Product Type | Ringbalance differential pressure transmitter with LCD display |
| Model | MU-Digital |
| Measuring Principle | Ringbalance principle |
| Measuring Pickup | Magnetic Hall sensor |
| Measurement Duties | Draft, pressure and differential pressure |
| Display | LCD, 3½ digit, 12.5 mm character height |
| Accuracy | Maximum error ±1.5% of span, or ±1.5 Pa |
| Ambient Temperature | 0 °C to +50 °C (32 °F to 122 °F) |
| Measuring Range and Units | |
| Measuring Range | 0…40 Pa to 0…1.8 kPa (0.15″ W.C. to 7″ W.C.) |
| Example Pressure, Draft and Differential Pressure Ranges | 0…40 Pa, 0…50 Pa, 0…60 Pa, 0…80 Pa, 0…100 Pa, 0…150 Pa, 0…200 Pa, 0…250 Pa, 0…300 Pa, 0…500 Pa, 0…600 Pa, 0…700 Pa, 0…800 Pa, 0…1,000 Pa, 0…1,200 Pa, 0…1,500 Pa, 0…1,800 Pa |
| Example Pressure / Draft Ranges | -20…0…+20 Pa, -25…0…+25 Pa, -50…0…+50 Pa, -100…0…+100 Pa, -250…0…+250 Pa, -500…0…+500 Pa, -10…0…+40 Pa, -40…0…+10 Pa, -30…0…+10 Pa, -10…0…+30 Pa, -20…0…+80 Pa, -80…0…+20 Pa |
| Units | Pa, kPa, daPa, mbar, mmWS, mmCE, in.W.C. |
| Outputs and Supply | |
| Output Signals | 0–20 mA, 4–20 mA and 0–10 V |
| Maximum Load | 680 Ohm for mA outputs; minimum 2 kOhm for voltage output |
| Power Supply | 230 VAC; also available with 24, 110, 120 or 240 VAC; 24 VDC at additional price |
| Housing and Connections | |
| Protection Rating | IP54 |
| Housing | Wall-mounted housing, polycarbonate, light grey |
| Process Connection | 2 fittings for flexible tubes, 8 mm outside diameter |
| Electrical Connections | Screw terminals in the terminal box |
| Cable Fittings | 2 cable fittings PG9 with strain relief |
| Filling Fluids and Overload Protection | |
| Filling Fluid | Factory-filled. The type of oil does not need to be stated in the order. |
| Mineral Oil | Density 0.8 kg/l; for ranges up to ±700 Pa; maximum overload ±900 Pa |
| Synthetic Oil | Density 1.9 kg/l; for ranges over ±700 Pa; maximum overload ±2.1 kPa |
| Overload Protection | DZ overload protection device available as an option where 900 Pa / 2.1 kPa limits may be exceeded |
| Compliance and Ordering | |
| EMC | According to EN50081-2 (Emission) and EN50082-2 (Immunity) |
| Required Order Information | Type, measuring range and power supply |
| Calibration | Factory calibration certificate included |
Support
Able Instruments are Rixen Messtechnik’s Exclusive Representative for Sales and Service in the UK and Ireland, providing application and configuration support for low-pressure transmitter applications.
- Application guidance: Advice on whether the MU-Digital is suitable for the required draft, pressure or differential pressure measurement duty
- Range selection: Support selecting the correct low-pressure range and display unit for the application
- Output and supply selection: Guidance on signal output, supply voltage and control system integration requirements
- Overload protection: Advice on whether DZ overload protection should be considered where pressure spikes may occur