SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500

SCHMIDT® Flow Sensor SS 20.500

The solution for flow measurement – especially for dusty air and gases. High precision and compact!

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Introduction Technical Data

SCHMIDT® Flow Sensor SS 20.500

The solution for flow measurement – especially for dusty air and gases. High precision and compact!

  • Dumb-bell head (independent of flow direction, easy to clean)
  • Flow and temperature signal
  • Probe length 100 … 1,000 mm (optional special length)
  • Remote sensor (optional)
  • Measuring ranges 0 … 1 m/s to 0 … 50 m/s
  • Coatings (optional; sensor head only)
  • Pressure resistant up to 10 bar
  • ATEX (optional):

- Gases, zone 2: II 3G Ex ec ic IIC T4 Gc

- Dust, zone 22: II 3D Ex tc ic IIIC T135°C Dc

To measure air and gas flows accurately and reproducibly, many parameters have to be correct. Therefore, the positioning of the sensor decisively determines the quality of the measurement results.

The gases to be measured also determine the choice of the right sensor. In safety-relevant areas such as the chemical industry the requirement for explosion protection has also to be considered which means that the selection of a suitable sensor is very limited.

  • Industrial processes
  • Cleanroom and Pharma
  • Ventilation and air conditioning

SCHMIDT Technology – Simply a question of better measurement

Technical data
Measuring quantity

Standard flow velocity wN based on standard conditions

Temperature of medium TM
Measured medium Clean air or nitrogen, additional gases on request
Measuring range wN 0 … 1 / 2.5 / 5 / 10 / 20 / 35 / 50 m/s
Lower detection limit wN 0.06 m/s
Max. display range wN -40 … +85 °C
 

Measuring accuracy
Standard wN ±(3 % of measured value + [0.4 % of fmr; min. 0.02 m/s])
High precision (optional) wN ±(1 % of measured value + [0.4 % of fmr; min. 0.02 m/s]) 2) (only for measuring range 0 … 1 m/s)
Response time (t90) wN 3 s (jump from 0 to 5 m/s in air)
Temperature gradient wN ≤ 2 K/min (at wN = 5 m/s in air)
TM (wN > 1 m/s) ±1 K (10 … 30 °C); ±2 K (remaining measuring range)
 

Operating temperature
Sensor probe -40 … +85 °C
Electronics -20 … +70 °C
Storage temperature -40 … +85 °C
 

General data
Humidity Measuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.) Compact version: 10 bar (overpressure)
Remote version: Atmospheric (700 hPa … 1,300 hPa)
Display 4 x Duo-LEDs (green/red/orange)
Supply voltage 24 V AC/DC ± 20 %
Current consumption Typ. < 60 mA (max. 170 mA)
Analog outputs
Type: Auto U / I)		 wN, TM
0 … 10 V / 4 … 20 mA (switching of signal characteristic depends on RL)
-Voltage output (0 … 10 V): RL ≥ 550 Ω (short-circuit protected)
- Current output (4 … 20 mA): RL ≤ 500 Ω
- Change-over hysteresis: 50 Ω
- CL ≤ 10 nF
Electrical connection Plug-in connector M12 (A-coded), male, 5-pin, screwed
ATEX approval only in combination with original cable!
Maximum cable length Voltage interface: 15 m; current interface: 100 m
Mounting position Arbitrary
Minimum immersion depth 58 mm (< 58 mm on request)
Protection type Sensor probe: IP67; enclosure: IP65; electrical connector: IP67 (with correctly attached cable)
Protection class III (SELV) or PELV (EN 50178)
ATEX category Gas (zone 2): II 3G Ex ec ic IIC T4 Gc
Dust (zone 22): II 3D Ex tc ic IIIC T135°C Dc
Probe length Compact version: 100/150/350 mm; special length: >100 … 1000 mm (step: 10 mm)
Remote version: 161 mm (probe); cable length: 3 m or special length 1 … 30 m (step: 1 m)
Weight 400 g max. (without connecting cable)
 

Material
Sensor head PBT (glass-fibre reinforced), stainless steel 1.4404
Sensor tube Stainless steel 1.4404
Protective coating (optional; sensor head only) Polyurethane derivate (black) / parylene (transparent)
Protective sleeve (ATEX option) Aluminium, anodised
Enclosure Aluminium, anodised
Sensor cable (of remote sensor) (TPE, halogenfree, black)
 

Dowloads
Product brochure (03/2024) Dowload PDF
Instructions for use (523375.02G) Dowload PDF
Instructions for ATEX (526488.02F) Dowload PDF
3D-STP data Dowload PDF
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  • Flow and temperature signal (optional)
  • Probe length 50 … 500 mm
  • Measuring ranges 0 … 10 m/s to 0 … 60 m/s
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