SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600
SCHMIDT® Flow Sensor SS 20.600

SCHMIDT® Flow Sensor SS 20.600

Flow rates of gases – an important measurement in industrial processes.

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Introduction Technical Data

SCHMIDT® Flow Sensor SS 20.600

Flow rates of gases – an important measurement in industrial processes.

  • Chamber head (fast response time)
  • Flow and temperature signal
  • Probe length 120 … 1,000 mm (optional special length)
  • Remote sensor (optional)
  • Measuring ranges 0 … 10 m/s to 0 … 220 m/s, special measuring range
  • Special gas adjustment for different gases (optional)
  • Pulse output
  • Profi-BUS DP-V0 and DeviceNet (optional)
  • ATEX (optional):

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

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

  • Grease free / O2 applications (optional)
  • Pressure resistant up to 40 bar
  • Temperature range -20 (-40) up to +120 °C

The detection of flow velocities in industrial processes is an important measure to save energy, secure quality assurance in the production process, recording or distribution of costs, and much more.

The SCHMIDT® Flow Sensor SS 20.600 is the rugged solution for demanding industrial applications. It can be used for different applications such as compressed air monitoring, gas monitoring for process burners, metering of gases and much more.

  • Compressed air consumption measurement
  • Inert gas flow measurement
  • Flow rate control
  • Compressor control
  • Exhaust air monitoring
  • Control of combustion air at block heating plants, burners and fuel cells

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 Air or nitrogen
Optional: Natural gas, biogas, CO2, special gases and gas mixtures
Measuring range wN 0 … 10 / 20 / 60 / 90 / 140 / 220 m/s
Optional: Customised measuring ranges in 0.1 m/s steps
Lower detection limit wN 0.2 m/s
Measuring range TM SS 20.600: -20 … +120 °C
SS 20.600 Ex: -40 … +120 °C
 

Measuring accuracy
Standard wN ±(3 % of measured value + [0.4 % of fmr; min. 0.08 m/s])
High precision (optional) wN ±(1 % of measured value + [0.4 % of fmr; min. 0.08 m/s])
Response time (t90) wN 1 s (jump of wN from 0 to 5 m/s in air)
Temperature gradient wN < 8 K/min (at wN = 5 m/s in air)
TM (wN > 2 m/s) ±1 K (10 … 30 °C); ±2 K (remaining measuring range)
 

Operating temperature
Sensor probe Standard/oxygen: -20 … +120 °C
ATEX: -40 … +120 °C
Electronics -20 … +70 °C
Electronics -20 … +85 °C
 

General data
Humidity Measuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.) Standard: 16 bar; option: 40 bar; oxygen (O2 > 21 %): 20 bar
Display 4 x Duo-LEDs (green/red/orange)
Supply voltage 24 V DC ± 20 %
Current consumption Typ. 80 mA (without pulse outputs); max. 250 mA (including signal currents of all outputs)
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
Pulse outputs: Signalization Standard: Frequency f ~ wN
f = 0 … fmax
fmax = 100 Hz (option: fmax = 10 … 99 Hz)
Optional: Pulse quantity:
1 pulse/1 m3; 1 pulse/0.1 m3; 1 pulse/0.01 m3 (max. 100 pulses/s)
Pulse outputs: Technology 1. Highside-driver (PNP, open collector) at protected supply voltage; not galvanically isolated)
Short-circuit protected (analog): 100 mA
High level: > supply voltage - 3 V
Leckage current: IOFF < 10 µA
2. Semiconductor relay; output galvanically isolated
Output voltage/current: Max. 30 V / 50 mA
Electrical connection Plug-in connector M12 (A-coded), male, 8-pin (shielded), screwed
ATEX approval only in combination with original cable!
Maximum cable length Voltage interface: 15 m
Current interface / pulse outputs: 100 m
Mounting position Arbitrary (with vertical downdraft: lower detection limit = 2 m/s at 16 bar)
Mounting tolerance ±3° relative to flow direction (unidirectional)
Minimum immersion depth DN25
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 ic tc IIIC T135°C Dc
Sensor length Compact version: 120/250/400/600 mm; special lengths from 120 to 1,000 mm (step: 10 mm)
Remote version: Probe 120/250/400/600 mm; Remote cable: 1 … 10 m (step: 1 m)
Weight Approx. 500 g max. (without connection cable)
 

Material
Enclosure Aluminium, anodised
Sensor tube, compression fitting Stainless steel 1.4571
Sensor head Platinum element (glass passivated); PPO/PA
Protective sleeve (ATEX option) Aluminium, anodised
Sensor cable (of remote sensor) Jacket (PUR, halogen free, UL)
 

Dowloads
Product brochure (04/2024) Dowload PDF
Instructions for use (535084.02D) Dowload PDF
Instructions for Use - ATEX (535698.02C) Dowload PDF
3D-STP data Dowload
Quick start guide (536020.02D) Dowload PDF
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Standard volume flow and medium temperature at a glance!