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

 

Under the designation SCHMIDT® Flow Sensor SS 20.260 SCHMIDT® Technology offers a flow sensor, which is characterized by its compact and rugged design. With a measuring range up to 60 m/s and its linear output signal, it is a universal sensor for measuring flow velocity, volume flow or mass flow on atmospheric conditions. The sensor element is well protected against mechanical stress by the impact resistant chamber head. By means of two LEDs the sensor indicates if the supply voltage is sufficient and whether the sensor is operating correctly.

 

  • Flow measurement in air ducts
  • Flow measurement in test benches
  • Control of the combustion air in oil, coal, wood or gas burners
  • Flow control in cooling and drying systems

 

SCHMIDT® Technology - simply a question of better measurement

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 flow wN0 … 2.5 / 10 / 20 / 40 / 50 / 60 m/s
Lower detection limit flow wN0.2 m/s
Measuring range temperature TM-20 … +120 °C
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) wN3 s (jump from 0 to 5 m/s)
Temperature gradient wN< 8 K/min at 5 m/s
Temperature TM (wN > 2 m/s)± 1 K (10 … 30 °C);
± 2 K (remaining measuring range)
Operating temperature
Sensor-20 … +120 °C
Electronics0 … +70 °C
Storage temperature-20 … +85 °C
Material
Sensor headPlatinum element, glass passivated; PPO/PA
Sensor tubeStainless steel 1.4571
HousingPBT, glassfiber 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: sensor defective
Supply voltage24 V DC ± 10 %
Current consumption< 60 mA
Analog outputs for wN and TM<No temperature output:
1 output (wN) 0 … 10 V (RL ≥ 10 kΩ)
or 1 output (wN) 4 … 20 mA (RL ≤ 300 Ω)
CL ≤ 10 nF

With temperature output:
2 outputs (wN and TM) 4 … 20 mA (RL ≤ 300 Ω)
CL ≤ 10 nF
Electrical connectionNon-detachable cable, 4 wires, length 2 m, with cable end sleeves
Maximum cable lengthVoltage interface: 15 m
Current interface: 100 m
Mounting positionArbitrary
Mounting tolerance± 3° to the flow direction
Protection type / classIP65 / III or PELV (EN 50178)
Probe length50 / 100 / 200 / 350 / 500 mm
Weight200 g max.

1) Standard velocity wN based on standard conditions of 20 °C and 1,013.25 hPa, 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 24 V/1 A DC (output), 115/230 V AC voltage supply535 282

Mounting and fixing technology

DescriptionArticle-Number
Mounting flange steel made of 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 the 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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