Insertion Thermal Mass Meters for compressed Air - by Hoentzsch

The principle of 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:

Advantages

chemical corrosion resistance
robust mechanical design
small dimensions
easy to clean
wide measuring range

Instrumentation

A combination of a thermal flow sensor TA and a suitable evaluation unit is necessary for successful measurement.

Thermal flow sensor TA10

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

Types of probes TA10

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 tubes TA·Di...

Measuring tube for registering standard volume flow/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