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Home/Sensors/Plant construction / industrial processes/SCHMIDT® Flow Sensor SS 20.260

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

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Specifications

Technical data
Measuring quantityStandard flow velocity wN based on standard conditions 1)
Temperature of medium TM (optional)
Measured mediumAir or nitrogen, other gases upon request
Measuring range wN0 … 2.5 / 10 / 20 / 40 / 50 / 60 m/s
Lower detection limit wN0.2 m/s
Measuring range TM (optional)-20 … +120 °C
Measuring accuracy
Standard wN±(5 % of measured value + [0.4 % of fmr; min. 0.02 m/s]) 2)
High precision (optional) wN±(3 % of measured value + [0.4 % of fmr; min. 0.02 m/s]) 2)
Response time (t90) wN3 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
Electronics0 … +70 °C
Storage temperature-20 … +85 °C
Material
Sensor headPlatinum element (glass passivated); PPO/PA
Sensor tubeStainless steel 1.4571
EnclosurePBT (glass-fibre reinforced)
Sensor cablePVC
General data
HumidityMeasuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.)Atmospheric (700 … 1,300 hPa)
DisplayLED green: Operating status
LED red (flashing): Sensor defective
Supply voltage24 V DC ± 10 %
Current consumption< 60 mA
Analog outputShort circuit protected; load capacity CL ≤ 10 nF
- Standard: wN1 x 0 … 10 V (RL ≥ 10 kΩ) or 4 … 20 mA (RL ≤ 300 Ω)
- Option: wN and TM2 x 4 … 20 mA (RL ≤ 300 Ω)
Electrical connectionNon-detachable cable, , 4 x 0,14 mm2, with ferrules:
- Standard: Length 2 m
- Special length: 3 … 100 m (step: 1 m)
Maximum cable lengthVoltage interface: 15 m; current interface: 100 m
Mounting positionArbitrary
Mounting tolerance±3° relative to flow direction (unidirectional)
Protection typeSensor probe: IP66; enclosure: IP54
Protection classIII (SELV) or PELV (EN 50178)
Probe length50/100/200/350/500 mm
Weight200 g max.

1) Standard conditions: TN = 20 °C and pN = 1,013.25 hPa

2) Related to adjustment reference; "fmr" = final measuring range

Subject to technical changes.

Order information

 DescriptionArticle-Number
Basic sensor without temperature outputSCHMIDT® Flow Sensor SS 20.260; 1 x output signal 4 … 20 mA or 0 … 10 V; cable length 2 m506 690-1XYZKA
 Options
Mechanical typeProbe length 50 mm 1    
Probe length 100 mm 2    
Probe length 200 mm 3    
Probe length 350 mm 4    
Probe length 500 mm 5    
Measuring range, adjustment accuracy and calibrationMeasuring range 0 … 1 m/s  1   
Measuring range 0 … 10 m/s  2   
Measuring range 0 … 20 m/s  3   
Measuring range 0 … 40 m/s  4   
Standard adjustment   1  
Standard adjustment with factory calibration certificate   3  
High precision adjustment flow with factory calibration certificate   2  
Output signals0 … 10 V    1 
4 … 20 mA    2 
Connecting cableCable length 2 m     1
Special length: 3 ... 100 m; 1 m steps     9

 

 DescriptionArticle-Number
Basic sensor with temperature outputSCHMIDT® Flow Sensor SS 20.260; 2 x output siganls 4 … 20 mA; cable length 2 m506 690-2XYZ4A
 Optionen
Mechanical typeProbe length 50 mm 1    
Probe length 100 mm 2    
Probe length 200 mm 3    
Probe length 350 mm 4    
Probe length 500 mm 5    
Measuring range and adjustmentMeasuring range 0 … 10 m/s  2   
Measuring range 0 … 20 m/s  3   
Measuring range 0 … 40 m/s  4   
Measuring range 0 … 50 m/s  5   
Measuring range 0 … 60 m/s  6   
Standard adjustment   1  
Standard adjustment with factory calibration certificate   3  
High precision adjustment with factory calibration certificate   2  
Connecting cableCable length 2 m     1
Special length: 3 … 100 m; 1 m steps     9

Accessories

Connection technology

DescriptionArticle-Number
Power supply unit: output 24 V / 1A DC, supply voltage 115/230 V AC (strip terminal)535 282

Mounting and fixing technology

DescriptionArticle-Number
Mounting flange, galvanized steel301 048
Compression fitting, brass, G½, atmospheric pressure517 206
Welding sleeve, stainless steel, G½, according to EN 10241, 2 pieces524 882
Press fitting, stainless steel, G½, atmospheric pressure539 746
Welding sleeve steel, G½, according to EN 10241, 5 pieces524 916
Assembly kit for pipe assembly suitable for MD 10.010/10.015, including pipe clamps and collar for adjustment to pipe diamter531 394

Measured value display

DescriptionArticle-Number
LED-display MD 10.010; in wall housing to show volume flow and flow velocity, 85 … 250 V AC and sensor power supply527 320
LED- display MD 10.010; similar to 527 320, similar to 527 320 but with 24 V DC voltage supply528 240
LED- display MD 10.015; similar to 527 320, similar to 527 320 but with an additional sum function and a second measuring input527 330
LED- display MD 10.015; similar to 527 330 but with 24 V DC voltage supply528 250

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