Technical Data; Thermal Mass Flow Sensor - TESTO 6446 Instruction Manual

TECHNICAL DATA

4

Thermal mass flow sensor

4.1
The thermal mass flow sensor for the compressed air volume flow
measurement is independent of the process pressure and the media
temperature.
Sensor
Media
Accuracy
Temperature monitoring
Reproducibility
Display, operation
Display units*
Measuring dynamics
Response time
Pressure-tight
Media temperature
Perm. ambient temp.
Perm. storage temp.
Media contact
Housing materials
Protection class
Electrical connection
Power supply
Readiness delay
Note
* The measurement, display and adjustment ranges are related to the
standard volume flow according to DIN ISO 2533 (15 °C, 1013 mbar and 0%
rel. humidity) if not otherwise stated in the calibration protocol of the sensor.
Thermal glass-coated ceramic sensor
Compressed air
For compressed air quality classes (ISO 8573:
particles to humidity to oil) 1:4:1: ±3% of
reading, ±0.3% of final value for compressed air
quality classes (ISO 8573) 3:4:4: ±6% of
reading, ±0,6% of final value
±2 °C
±1.5% of reading
4-digit, alphanumerical display, two operating
buttons, user menu, operating menu, 5 x green
LED (measurement units), 1 x green LED
(function display 10
status)
Nl/min, Nm³/h, Nm/s, Nm³, °C
1:300
< 0.1 s
up to 16 bar (DN 250 to 14 bar)
0 to + 60 °C (rel. humidity max. 90%)
0 to + 60 °C
-20 to + 85 °C
V2A (1.4301) or galvanised steel, glass-coated
ceramic, PEEK, polyester, Viton, anodised
aluminium
PBT-GF 20, PC (APEC), Makrolon, V2A
(1.4301) or galvanised steel, Viton
IP65 / III
M12 x 1 connector, can be loaded to 250 mA,
short-circuit-proof
19 to 30 VDC, voltage supply < 100 mA
1 s
Based on the small size, the sensor only has a small contact
surface. The pressure loss is thus negligible (typically
1 mbar).
3
), 2 x yellow LED (switching
15