The mass flow meter (MFM) Type 8701 is suited for measuring the mass flow of gases over a big flow range. The thermal MEMS sensor is located directly in the gas stream and therefore reaches very fast response times. Type 8701 can optionally be calibrated for two different gases; the user can switch between these two gases. As electrical interfaces both, analog standard signals and fieldbuses are available.
| Seal | FKM, EPDM |
| Housing | PC (polycarbonate) or stainless steel sheet 1.4301 |
| Base block | Aluminium or stainless steel 1.4305 |
| Total weight | Approx. 500 g (aluminium) |
| Nominal flow range (QN) | 10 ml/min…80 l/min regarding 2N |
| Operating pressure 3) | Max. 10 bar (145 psi) (depending on the nominal diameter of the proportional valve) |
| Repeatability | ± 0.1 % FS |
| Measuring span | 1:50 (higher measuring span on request) |
| Response time (t95 %) | < 300 ms |
| Operating voltage | 24 V DC |
| Power consumption | Max. 2.5 W (5 W with fieldbus variant) |
| Residual ripple | < 2 % |
| Voltage tolerance | ± 10 % |
| Electrical connection | D-Sub, 15-pin |
| Medium temperature | - 10 °C…+ 70 °C (- 10 °C…+ 60 °C for oxygen) |
| MOQ | 1 |