Measurement without pressure loss
Thermal mass measurement without moving parts enables precise flow measurement with negligible pressure loss and no wear.
- Thermal mass flow sensorMeasurement principle without moving parts, negligible pressure loss, robust sensor tip, and easy cleaning.
- Display of 4 values + diagnosticsDisplay shows flow, total consumption, velocity, and temperature, with diagnostic functions (errors and service information).
- Configuration and serviceSettings and diagnostics via display, PI 500 handheld, or service software; remote access via Modbus is also possible (depending on version).
- Installation under pressureEasy installation and removal under pressure through a 1/2" ball valve, with safety ring and insertion-depth scale.
- Industrial versionRobust aluminum housing, IP67 protection, and stainless-steel wetted parts.
| Parameter | Low-Speed | Standard | Max | High-Speed |
|---|---|---|---|---|
| Measuring principle | Thermal mass flow sensor | |||
| Measuring range (flow velocity) [m/s] | up to 50 | up to 92.7 | up to 185 | up to 224 |
| Reference conditions | DIN 1343 (0 °C, 1013 mbar) | |||
| Accuracy (standard) | ± 1.5% rdg. ± 0.3% f.s. | |||
| Accuracy (optional) | ± 1.0% rdg. ± 0.3% f.s. | |||
| Response time (t90) [s] | < 3 | |||
| Ambient temperature [°C] | –20 … +70 | |||
| Media temperature [°C] | –20 … +180 (ATEX: –20 … +120) | |||
| Outputs – standard | 1 × 4–20 mA analog output, pulse output, RS 485 (Modbus RTU) | |||
| Outputs – optional | 2 × 4–20 mA, Modbus TCP, HART, PROFIBUS DP, PROFINET, M-Bus, IO-Link | |||
| Protection class | IP67 (ATEX II 2D: IP64) | |||
| Material | Die-cast aluminum housing; sensor tube: stainless steel 1.4404 | |||
| Mounting thread | G 1/2" ISO 228; NPT 1/2", R 1/2", PT 1/2" | |||
| Operating pressure [bar] | up to 50; special version up to 100 (with DVGW approval max. 16) | |||
| Power supply | 18 … 36 V DC, 5 W | |||
