The principle of air flow measurement is based on heat transport from an electrically heated body in ambient air dependent on the relative velocity between both.
Höntzsch TA10b sensors are using a thin film sensor element. Thin film sensor elements consist of an electrically heated Ni-resistor an a Ni-resistor temperature probe.
Höntzsch TA20 sensors and measuring tubes TA Di consist of an electrically heated Pt100 and two Pt100 temperature probes. One of the two temperature probes measures the temperature of the electrically heated Pt100, the other the temperature of the flowing air.
Höntzsch thermal flow sensors TA are able to measure not only the lowest but also high velocities and meet all requirements for industrial application:
- chemical corrosion resistance
- robust mechanical design
- small dimensions
- easy to clean
- wide measuring range
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A combination of a thermal flow sensor TA and a suitable evaluation unit is necessary for successful measurement.
For measuring standard velocity, standard volume flow and temperature of medium.
| TA10 probe designs |
Figure 1 |
Figure 2 |
Figure 3 |
| Figure 1 |
extendable sensor, ideal for mobile measuring |
| Figure 2 |
sensor with connector box and probe guide pieces, e.g. for installation in pipe lines from Di 32 mm |
| Figure 3 |
sensor with connector box and probe guide pieces protection type EEx q [ia] IIC T5 |
- Measuring range 0,2...120 Nm/s
- Probe diameter 10 mm
- Working temperature range: -10 °C...+140 °C;
- Maximum working pressure: 10 bar pressure above atmospheric
- Probe tube materials: stainless steel 1.4571, 1.4305, polyamide, epoxy resin, glass
Measuring tube for registering standard volume flow, air mass flow and temperature of air.
Measuring tube TA Di...ZG1b with integrated transducer U10a
Measuring tube TA Di...ZG2b with directly outcoming cable to connect to a hand-held HTA or a separate transducer U10a
- Tubes according to EN ISO 1127 / DIN 2463
- Tube connections: External thread by DIN 2999
- Input/output section: Length relation about 2/3 to 1/3
Measuring ranges
| Measuring tube inside diameter [mm] |
Smallest measurable value [Nm3/h] |
Terminable value [Nm3/h] |
| 16 |
0,14 |
43 / 86 |
| 21,6 |
0,26 |
79 / 158 |
| 27,2 |
0,42 |
125 / 250 |
| 35,9 |
0,73 |
219 / 438 |
| 41,8 |
0,99 |
296 / 592 |
Tube connections dependent on inside diameter of measuring tube: tube fitting, cutting ring fitting and flange connection.
- partly also with input/output section
- measuring range: 0.08...60 Nm/s
- working temperature range: -10 °C...+100 °C
- maximum working pressure: up to 12 bar pressure above atmospheric
- materials: stainless steel, glass, epoxy resin, VITON ( Dupont)
Measuring ranges
| Measuring tube inside diameter [mm] |
Smallest measurable value [Nm3/h] |
Terminable value [Nm3/h] |
| 10 |
0,03 |
17 |
| 15 |
0,05 |
38 |
| 20 |
0,09 |
68 |
| 25 |
0,15 |
106 |
| 32 |
0,23 |
174 |
| 40 |
0,36 |
270 |
| 50 |
0,57 |
424 |
| 65 |
0,96 |
716 |
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