SCHMIDT® Duplex-Laminar-Flow Sensor SS 20.415 Twin

Double validation of laminar flow

(registered design)

 

Thermal duplex flow sensor for redundant validation of laminar flow applications at one measuring point.

 

  • Redundant validation of laminar flow applications
  • ? Two independently working high-nd flow sensors in one unit
  • ? Easy installation at one measuring point
  • ? No mutual influencing of the measurement
  • ? Confined space becomes a minor matter
  • ? ‚Plug and Play’ and quick assembly
  • ? Precise measurement of low flo velocitie[wN]
  • ? Straight and angled design for wall oceiling mounting
  • Thermopile head (very fast response time)
  • Probe length straight version: 300 mm
  • Probe length angled version: 150 / 270 x 300 mm
  • Measuring ranges 0 … 1 m/s to 0 … 2.5 m/s
  • Cleanroom sensor
  • Extremely compact, because electronics are integrated into the sensor tube
  • Sensor element in the chamber head and protected against mechanical stress
  • Linear analog output for measured value output
  • Special version for the laminar-flow monitoring in cleanrooms with quick-mounting system for simple installation in cleanroom ceiling systems and walls.

 

 

  • Laminar flow monitoring in cleanrooms
  • Flow monitoring in pharmaceutical production, semiconductor manufacturing, food production, LCD manufacturing and optical industry
  • Integration into insulators, FFUs and flow boxes

 

  • ** Available from mid of July 2022 ***

 

SCHMIDT® Technology - simply a question of better measurement

Specifications

Technical data
Measuring quantityStandard flow velocity wN, based on standard conditions 1)
Measured medium Clean air, nitrogen, additional gases on request
Measuring range flow wN0 … 1 / 2.5 m/s
Max. display range flow wN+ 10 % above measuring range
Lower detection limit flow wN0.05 m/s
Measuring accuracy
Standard wN± (3 % of measured value + 0.05 m/s) 1)
High precision (optional) wN± (1 % of measured value + 0.04 m/s) 1)
Response time (t90) wN1 s (configurable: 0.01 ... 10 s)
Temperature gradient wN< 2 K/min at 5 m/s
Operating temperature
Sensor0 … +60 °C
Storage temperature-20 … +85 °C
Material
Sensor headStainless steel 1.4404
Sensor tubeStainless steel 1.4404
Plug connectorStainless steel 1.4404
General data
HumidityMeasuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.)Atmospheric (700 … 1,300 hPa)
Supply voltage24 V DC ± 10 %
Current consumptionTyp. 35 mA / max. 160 mA (including all signal output currents)
Analog output wN2 x 0 … 10 V (RL > 10 kΩ; CL ≤ 10 nF; short-circuit protected)
2 x 4 … 20 mA (RL < 300 Ω; CL ≤ 100 nF, (wN1 und wN2)
Error signalOnly with current interface: 2 mA (according to NAMUR NE43)
Electrical connectionPlug-in-connector M9, male, 7-pin (shielded), screwed
Maximum cable lengthVoltage interface: 15 m
Current interface: 100 m
Mounting positionIn vertical flow direction
Protection type / classIP65 / III or PELV (EN 50178)
Sensor lengthAngled: 150 or 270 mm (vertical) x 300 mm (horizontal)
Straight: 300 mm
WeightApprox. 250 g (angled design with 270 x 300 mm)

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 sensorSCHMIDT® Duplex-Laminar-Flow Sensor SS 20.415 Twin with thermopile head; Basic version: wN1 and wN2566 950 -ABCDEFG
Options
TypeStandard 1      
Mechanical typeSensor length 150 x 300 mm (angled)  1     
Sensor length 270 x 300 mm (angled)  2     
Sensor length 300 mm (straight)  3     
Mechanical fixingThreaded bush M25 with counternut (type 1)   1    
Threaded bush M25 with thread adapter M25 x 1.5 to PG21 (type 2)   2    
Threaded bush M25 with shank nut (type 3)   3    
Welding bush (type 4)   4    
Flange bush (type 5)   5    
Without fixation material   6    
Measuring range0 … 1 m/s    1   
0 … 2.5 m/s    2   
Output signals0 … 10 V     1  
4 … 20 mA     2  
Adjustment accuracy and calibrationStandard adjustment without certificate      1 
Standard adjustment with certificate      2 
High precision adjustment with factory calibration certificate      3 
Sensor programmingFactory setting       1

Accessoroes

Connection technology

DescriptionArticle-Number
Coupler socket, 7-pin with soldering sleeves for cable Ø 0.14 mm²535 278
Connection cable with coupler socket, 5 m length, open cable ends, material PUR535 279
Connection cable with coupler socket, length ________ m, open cable ends (length 2 … 100 m; 1 m steps)505 911 - 4
Connection cable, 7-pin with angled socket, 10 m length, open cable ends, material PUR535 281
Power supply 24 V/1 A DC (output), 115/230 V AC voltage supply535 282

Mounting and fixing technology

DescriptionArticle-Number
Assemply kit for tube connection for MD 10.010 / 10.015 with hose clamps and band to adapt it so the tube’s diameter531 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 but with 24 V DC voltage supply528 240
LED display MD 10.015, 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

Miscellaneous

DescriptionArticle-Number
Measuring Section Calibrator set (8 / 12 / 16 mA)546 741 - 4

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