SCHMIDT® Flow Sensor SS 20.260

  • Chamber head (fast response time)
  • Flow and temperature signal (optional)
  • Probe length 50 … 500 mm
  • Measuring ranges 0 … 10 m/s to 0 … 60 m/s
  • Temperature range +120 °C

SCHMIDT® Flow Sensor SS 20.260

  • Chamber head (fast response time)
  • Flow and temperature signal (optional)
  • Probe length 50 … 500 mm
  • Measuring ranges 0 … 10 m/s to 0 … 60 m/s
  • Temperature range +120 °C

SCHMIDT Technology offers a price sensitive flow sensor under the designation SS 20.260, which is characterised by its compact and rugged design. With a measuring range up to 60 m/s and its linear output signal, it is an universal sensor for measuring flow velocity, volume flow or mass flow under atmospheric conditions. The sensor element is well protected against mechanical stress by the impact resistant chamber head. Via two LEDs, the sensor indicates whether the supply voltage is sufficient and if it works properly.

  • Industrial processes
  • Flow measurement in air ducts
  • Control of the combustion air in oil, coal, wood or gas burners
  • Ventilation and air conditioning
  • Flow control in cooling and drying systems

SCHMIDT Technology – Simply a question of better measurement

Technical data

Measuring quantity

Standard flow velocity wN based on standard conditions temperature of medium TM (optional)

Measured medium Clean air or nitrogen, additional gases on request
Measuring range wN 0 … 2.5 / 10 / 20 / 40 / 50 / 60 m/s
Measuring range TM (optional) -20 … +120 °C
Lower detection limit wN 0.2 m/s
 

Measuring accuracy

Standard wN ±(5 % of measured value + [0.4 % of fmr; min. 0.02 m/s])
High precision (optional) wN ±(3 % of measured value + [0.4 % of fmr; min. 0.02 m/s])
Response time (t90) wN 3 s (jump from 0 to 5 m/s)
Temperature gradient wN < 8 K/min (at wN = 5 m/s in air)
TM (wN > 2 m/s) ±1 K (0 … 40 °C)
±2 K (remaining measuring range)
 

Operating temperature

Sensor probe -20 … +120 °C
Electronics 0 … +70 °C
Storage temperature -20 … +85 °C
 

General data

Humidity Measuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.) Atmospheric (700 … 1,300 hPa)
Display LED green: Operating status
LED red (flashing): Sensor defective
Supply voltage 24 V DC ± 10 %
Current consumption < 60 mA
Analog outputs Short circuit protected; load capacity CL ≤ 10 nF
- Standard: wN 1 x 0 … 10 V (RL ≥ 10 kΩ) or 4 … 20 mA (RL ≤ 300 Ω)
- Option: wN and TM 2 x 4 … 20 mA (RL ≤ 300 Ω)
Electrical connection Non-detachable cable, , 4 x 0,14 mm2, with ferrules:
- Standard: Length 2 m
- Special length: 3 … 100 m (step: 1 m)
Maximum cable length Voltage interface: 15 m
Current interface: 100 m
Mounting position Arbitrary
Mounting tolerance ±3° relative to flow direction (unidirectional)
Protection type Sensor probe: IP66; enclosure: IP54
Protection class III (SELV) or PELV (EN 50178)
Sensor length 50/100/200/350/500 mm
Weight 200 g max
 

Material

Sensor head Platinum element (glass passivated); PPO/PA
Sensor tube Stainless steel 1.4571
Enclosure PBT (glass-fibre reinforced)
Sensor cable PVC
 

Dowloads

Product brochure (10/2022) Dowload PDF
Instructions for use (508981.02J) Dowload PDF
3D-STP data Dowload PDF
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