SCHMIDT Technology
Technical Data
Measuring quantity wN Standard flow velocity wN normalized to TN = 20 °C and pN = 1,013.25 hPa
temperature of the medium TM
Measuring fluid Air, nitrogen, other gases on request
Measuring range flow wN 0 … 1 / 2,5 / 5 / 10 / 20 / 35 / 50 m/s
Lower detection limit wN 0,06 m/s
Temp. Range measuring TM -40 °C … +85 °C
Accuracy
Standard wN ±(3 % of the measured value + [0.4 % v. MBE; min. 0.02 m/s]) 1)
High precision (optional) wN ±(1 % of the measured value + [0.4 % v. MBE; min. 0.02 m/s]) 1)
Repeatability wN ±1 % of the measured value
Response time (t90) wN 1 s (jump from 0 to 5 m/s air)
Temperature gradient wN ≤ 2 K/min at 5 m/s
Measuring accuracy TM
(wN >1 m/s)
±1 K (10 °C … 30 °C); ±2 K (remaining measuring range)
Operating temperature
Sensor -40 °C … +85 °C
Electronics -20 °C … +70 °C
Storage temperature -40 °C … +85 °C
Material
Housing Aluminium, anodised
Sensor tube Stainless steel 1.4571
Sensor head PBT fibre-glass reinforced, stainless steel 1.4571
Protective coating (optional) Polyurethane derivate / parylene
Protective sleeve (ATEX-Option) Aluminium, anodized
Sensor cable
(remote sensor)
(PUR, halogenfree, UL)
General Data
Medium Non-condensing (up to 95 % rF)
Pressure
- standard sensor
- discontinued sensor
 
10 bar
Atmospheric (700 hPa … 1,300 hPa)
Display 4 x duo-LEDs (green / red / orange)
Supply voltage 24 V AC / DC ± 20 %
Current consumption 60 mA typ. (max. 170 mA)
Analog outputs for temperature
and velocity Auto U/I
0 … 10 V / 4 … 20 mA (short-circuit protected)
Voltage output: RL ≥ 550 Ω
Current output: RL ≤ 500 Ω
Change-over hysteresis: 50 Ω
Electrical connection Plug-in connection M12 screwed, 5-pin, male
Maximum cable length Voltage output: 15 m, current output 100 m
Mounting position Any
Minimum inmersion 58 mm (< 58 mm on request)
Protection class IP67 (sensor head) / IP65 (housing) / III or PELV
ATEX-category II 3D Ex tc IIIC T125 ºC Dc IP64
II 3G Ex nA IIC T4 Gc
Sensor length 100 / 150 / 350 mm (remote Version); Length 100 … 1000 mm
Weight by mass 400 g max. (without cable)

1) under reference conditions, related to the calibration reference

Subject to technical changes.