#
Flow sensor

The flow sensor is used to measure and monitor flow rate and air consumption values. Measurement is carried out by means of a thermal procedure, whereby the amount of heat drawn from a heated surface of the sensor by the medium flowing past it is calculated. The flow rate or the accumulated air consumption is based on the amount of heat drawn.

Connection to higher-order systems is established via two switching outputs (Out A/B) and an analogue output (Out C). Switching points can be defined for both binary outputs. Switching points are possible for both switching outputs for measuring the flow rate; a consumption switching pulse for output A (Out A) is possible for measuring the accumulated air consumption. The flow rate value is output via the analogue output. The flow rate or air consumption is shown on the display.

Adjustable parameters

Switch (A)
Designation |
Range |
Default value |

Output function |
Make switch, Break switch |
Make switch |

Switching function |
Threshold value, Window comparator |
Threshold value |

Volume measurement |
| false |

Switching point 1 (Flow rate) |
-5000 ... 5000 l/min |
10 |

Switching point 2 (Flow rate) |
-5000 ... 5000 l/min |
20 |

Hysteresis (Flow rate) |
0 ... 5000 l/min |
0 |

Switching point 1 (Volume) |
0 ... 100000 l |
100 |

Switching point 2 (Volume) |
0 ... 100000 l |
200 |

Hysteresis (Volume) |
0 ... 10000 l |
0 |

Switch (B)
Designation |
Range |
Default value |

Output function |
Make switch, Break switch |
Make switch |

Switching function |
Threshold value, Window comparator |
Threshold value |

Volume measurement |
| false |

Switching point 1 (Flow rate) |
-5000 ... 5000 l/min |
10 |

Switching point 2 (Flow rate) |
-5000 ... 5000 l/min |
20 |

Hysteresis (Flow rate) |
0 ... 5000 l/min |
0 |

Switching point 1 (Volume) |
0 ... 100000 l |
100 |

Switching point 2 (Volume) |
0 ... 100000 l |
200 |

Hysteresis (Volume) |
0 ... 10000 l |
0 |

Analog output (C)
Designation |
Range |
Default value |

Min. Flow rate |
-5000 ... 5000 l/min |
0 |

Max. Flow rate |
-5000 ... 5000 l/min |
100 |

Voltage at q1 |
-100 ... 100 V |
0 |

Voltage at q2 |
-100 ... 100 V |
10 |

Designation |
Range |
Default value |

Minimum voltage |
1 ... 300 V |
12 |

Idle current (24 V) |
1 ... 10000 mA |
32 |