SCHMIDT Technology
Technical Data
Measurement values wN Standard flow velocity wN normalized to TN; 20 °C and pN; 1,013.25 hPa
Measuring fluid Air, nitrogen, other gases on request
Measuring range wN 0 … 1 / 10 / 20 m/s
Threshold wN 0.1 m/s up to the end of measuring range
Accuracy
Switching hysteresis wN ± 5 % of threshold; min. 0.1 m/s
Setting threshold wN Potentiometer (270°), optionally pre-programmed
Accuracy threshold pre-programmed ± (3 % of measuring value + 0.1 m/s)
Repeatability wN ± (2 % of threshold + 0.1 m/s)
Response time (t90) wN 3 s (jump from 0 to 5 m/s air)
Switch-on delay 20 s
Temperature gradient wN < 2 K/min at 5 m/s
Operating temperature
Sensor - 20 °C … + 85 °C
Electronics - 20 °C … + 70 °C
Storage temperature - 20 °C … + 85 °C
Material
Housing PBT, fibre-glass reinforced
Sensor tube Stainless steel 1.4571
Sensor head PBT, fibre-glass reinforced, aluminium anodized
Protective coating Polyurethane derivative
Connecting cable PVC
General Data
Medium environment Non-condensing (up to 95 % rF)
Operating pressure 0 … 10 bar
Display LED green: operating status
LED red: switching status
Supply voltage 24 V DC ± 20 %
Current consumption Type <70 mA
Switching output Semiconductor relais; max. 30 V / 100 mA / 300  mW ; RON, max = 25 Ω
Electrical connection Permanently connected cable, 4-pin, length 2 m
Admissible cable length >100 m max.
Mounting position Any
Minimum inmersion >58 mm (< 58 mm on request)
Protection class Housing: IP 65, Sensor head: IP 67 / III or PELV
MTTF-Wert (per 01.01.2011) > 50 years
Sensor length 100 / 200 / 350 / 500 mm
Weight Approx 100 g (L = 350 mm)

Technical data subject to change.