Product Overview
The Aplisens PRE-28.Modbus is configured per application (DP range, process connection, casing/IP rating, Modbus settings, and approvals such as ATEX/IECEx Ex ia or Ex d). To ensure proper selection and accurate pricing, please call 865-900-8844 or email KSmith@CPSCalibrations.com for a custom quote.
The Aplisens PRE-28.Modbus is a differential pressure transmitter designed for industrial measurement of differential pressure of gases, vapours, and liquids. It communicates using Modbus RTU for reliable integration into PLC/SCADA networks, and supports intrinsic safety (ATEX/IECEx) and explosion-proof (ATEX/IECEx) versions. :contentReference[oaicite:0]{index=0}
- Communication: Modbus RTU
- Accuracy: ±0.1% of calibrated range
- Static pressure limit: up to 413 bar (option dependent)
- Operating modes: Modbus mode + configuration/diagnostics mode (4–20 mA loop can be enabled in configuration mode on non-Ex ia versions)
- Approvals: ATEX / IECEx (Ex ia / Ex d options), marine certificates (DNV / BV)
- Materials: wetted parts and diaphragms 316L SS
Tell us your DP range, static pressure requirement, process connection style (C/CH manifold, GP, PN), and whether you need Ex ia or Ex d. We’ll confirm the correct build and provide a formal quote.
| Feature | Details |
|---|---|
| Model | Aplisens PRE-28.Modbus |
| Type | Differential Pressure Transmitter |
| Output / Communication | Modbus RTU (digital); 4–20 mA available in configuration mode on non-Ex ia versions |
| Power Supply | 4…28 VDC (Ex ia version: 4…10 VDC) |
| Accuracy | ±0.1% of calibrated range |
| Long-term Stability | ≤ accuracy for 3 years (basic range) |
| Thermal Compensation Range | -25…80°C |
| Thermal Error | < ±0.08% (FSO) / 10°C (max ±0.3% FSO across compensation range) |
| Transmission Distance | Up to 1200 m |
| Modbus Address Space | 1…247 device addresses |
| Baud Rates | 1200, 2400, 4800, 9600, 19200, 28800, 38400, 57600, 115200 bps |
| Parity / Frame | No parity / Odd / Even; 10…11 bits (1–2 stop bits) |
| Materials | Wetted parts & diaphragms: 316L SS; casing: 304 SS (optional 316 SS) |
Measuring ranges (nominal FSO) & minimum set range:
| No. | Nominal Measuring Range (FSO) | Minimum Set Range | Rangeability | Overpressure / Static Pressure Limit |
|---|---|---|---|---|
| 1 | 0…70 bar | 7 bar | 10:1 | C-type: 250 / 320 / 413 bar GP-type: 40 bar (for range 1: 70 bar) |
| 2 | 0…16 bar | 1.6 bar | 10:1 | C-type: 250 / 320 / 413 bar |
| 3 | 0…2.5 bar | 0.2 bar | 12.5:1 | C-type: 250 / 320 / 413 bar |
| 4 | 0…1 bar | 50 mbar | 20:1 | C-type: 250 / 320 / 413 bar |
| 5 | 0…0.25 bar | 10 mbar | 25:1 | C-type: 250 / 320 / 413 bar |
| 6 | -0.5…0.5 bar | 0.1 bar | 10:1 | C-type: 250 / 320 / 413 bar |
| 7 | -100…100 mbar | 10 mbar | 20:1 | C-type: 250 / 320 / 413 bar |
| 8 | -5…70 mbar | 4 mbar | 18:1 | C-type: 250 / 320 / 413 bar |
Note: static pressure capability depends on process connection and selected options. For full Modbus register details, refer to the user manual. :contentReference[oaicite:1]{index=1}
PRE-28.Modbus pricing depends on configuration. To quote correctly, we typically confirm:
| What We Need | Examples |
|---|---|
| Approval / Version | /Exia (ATEX/IECEx intrinsic safety) or /Exd (ATEX/IECEx explosion-proof); /MR (marine DNV/BV) |
| Static Pressure Option | /320 bar or /413 bar (only for C process connection) |
| Nominal Range | 0…70 bar, 0…16 bar, 0…2.5 bar, 0…1 bar, 0…0.25 bar, -0.5…0.5 bar, -100…100 mbar, -5…70 mbar |
| Calibrated Range | Set the DP range to match your process (example: nominal 0…1 bar, calibrated 0…0.6 bar) |
| Casing / Electrical Connection | /PM12, /PM12S, /PKD, /SG, /SGM, /PZ2 (Ex d only) |
| Process Connection | /C or /CH (manifold mount), /GP (G1/2" male), /PN (1/4" NPT female), diaphragm seal option |
| Gasket (C/CH) | FPM Viton standard; /NBR or /PTFE (PTFE max static pressure 250 bar) |
| Modbus Setup | Device address (1–247), baud rate, parity; network length up to 1200 m |
Call 865-900-8844 or email KSmith@CPSCalibrations.com and we’ll help select the correct range, connection, approvals, and Modbus settings for your application.
Need help selecting Ex ia vs Ex d, or setting up your Modbus address/baud/parity? Contact us and we’ll help you get the correct PRE-28.Modbus configuration.
