| Measuring Principle | Ultrasonic flow | |
| Product headline | The device for accurate, reliable biogas measurement with loop-powered technology.
Inline flowmeter designed for measurement of wet biogas and digester gas under fluctuating process conditions. | |
| Sensor features | Optimized for low pressure gas – specialized sensor design. No additional pressure loss – full-bore design. Process transparency – diagnostic capability.
Multivariable device: flow, temperature and methane. Medium temperature: 0 to 80 °C (32 to 176 °F). Process pressure: 0.7 to 11 bar a (10.2 to 159 psi a). | |
| Transmitter features | Convenient device wiring – separate connection compartment. Safe operation – no need to open the device due to display with touch control, background lighting. Integrated verification – Heartbeat Technology.
Loop-powered technology. Robust dual-compartment housing. Plant safety: worldwide approvals. | |
| Nominal diameter range | Single‐path version: DN 50 (2"), DN 80 (3") Two‐path version: DN 100 to 200 (4 to 8") | |
| Wetted materials | Sensor: 1.4404/1.4435 (316L) Transducer: HNBR Temperature sensor (option): AFM 34 | |
| Measured variables | Volume flow, corrected volume flow, corrected methane volume flow, energy flow, methane fraction, calorific value, temperature | |
| Max. measurement error | Volume flow (standard): ‐ ±1.5 % o.r. for 3 to 30 m/s (9.84 to 98.4 ft/s) ‐ ±3 % o.r. for 1 to 3 m/s (3.28 to 9.84 ft/s) Volume flow (option): ‐ ±0.1 % o.f.s. for 0.3 to 1 m/s (0.98 to 3.28 ft/s) ‐ ±1.5 % o.r. for 1 to 30 m/s (3.28 to 98.4 ft/s) | |
| Measuring range | Standard: 1 to 30 m/s (3.28 to 98.4 ft/s) Option: 0.3 to 30 m/s (0.98 to 98.4 ft/s) | |
| Max. process pressure | 11 bar a (159 psi a) | |
| Medium temperature range | 0 to +80 °C (+32 to +176 °F) | |
| Ambient temperature range | Flange material carbon steel: –10 to +60 °C (+14 to +140 °F) Flange material stainless steel: –40 to +60 °C (–40 to +140 °F) | |
| Transmitter housing material | AlSi10Mg, coated; 1.4404 (316L) | |
| Degree of protection | IP66/67, type 4X enclosure | |
| Display/Operation | 4‐line backlit display with touch control (operation from outside) Configuration via local display and operating tools possible | |
| Outputs | 4‐20 mA HART (passive) 4‐20 mA (passive) Pulse/frequency/switch output (passive) | |
| Inputs | Current input 4‐20 mA (passive) | |
| Digital communication | HART | |
| Power supply | DC 12 to 35 V (4‐20 mA HART with/without pulse/frequency/switch output) DC 12 to 30 V (4‐20 mA HART, 4‐20 mA) DC 12 to 35 V (4‐20 mA HART, pulse/frequency/switch output, 4‐20 mA input) DC 9 to 32 V (PROFIBUS PA, pulse/frequency/switch Output) | |
| Hazardous area approvals | ATEX, IECEx, cCSAus, NEPSI, INMETRO, JPN | |
| Metrological approvals and certificates | Calibration performed on accredited calibration facilities (acc. to ISO/IEC 17025) | |
| Pressure approvals and certificates | PED | |
| Material certificates | 3.1 material (wetted parts) | |