SCHMIDT® Flow Sensor SS 20.225
SCHMIDT® Flow Sensor SS 20.225
SCHMIDT® Flow Sensor SS 20.225
SCHMIDT® Flow Sensor SS 20.225

SCHMIDT® Flow Sensor SS 20.225

A small all-rounder – universal and powerful

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Introduction Technical Data

SCHMIDT® Flow Sensor SS 20.225

A small all-rounder – universal and powerful

  • Dumb-bell head (largely independent from flow direction, easy to clean)
  • Flow velocity and temperature signal
  • Probe length 100 … 500 mm
  • Measuring ranges 0 … 1 / 2.5 / 10 / 20 m/s
  • Optional coated (PU, black)

In many applications, the direct measurement of flow velocity and volume flow in air and gases is the ideal solution. Due to the high demands of modern control technology, the flow sensor has to measure precisely and fast an extremely wide measuring range from "almost zero" up to the maximum value.

  • Energy-efficient control of ventilators
  • Monitoring filter units
  • Regulation and control of flow rate for extraction systems
  • Industrial processes

Successor product for SS 20.015 and SS 20.016 (coated version but not pressure-resistant)

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 / 10 / 20 m/s
Lower detection limit flow wN 0.06 m/s
Measuring range temperature TM -20 … +70 °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) 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 and electronics -20 … +70 °C
Storage temperature -30 … +85 °C
 

General data
Humidity Measuring mode: Non-condensing (< 95 % RH)
Operating pressure (max.) Atmospheric (700 … 1,300 hPa)
Display LED green: Operating status
LED red (flashing): sensor defective
Supply voltage 24 V DC ± 10 %
Current consumption Typ. < 60 mA (max. 100 mA)
Analog outputs for wN and TM 0 … 10 V (RL ≥ 10 kΩ, short circuit protected; CL ≤ 10 nF)
Electrical connection Standard: Non-detachable cable, 4 wires, length 2 m
Special cable length (option): 3 … 15 m (steps of 1 m)
Maximum cable length 15 m
Mounting position Arbitrary
Minimum immersion depth 58 mm (< 58 mm upon request)
Protection type Sensor head: IP67; enclosure: IP65
Protection class III (SELV) or PELV (EN 50178)
Probe length 100/200/350/500 mm
Weight Approx. 100 g (L = 350 mm)
 

Material
Sensor tube Stainless steel 1.4571
Sensor head PBT (glass-fiber-reinforced), stainless steel 1.4571
Protective coating (optional) Polyurethan (PU)
Sensor cable PVC
Housing PBT (glass-fiber-reinforced)
 

Dowloads
Product brochure (04/2024) Dowload PDF
Instructions for Use (569899Rev0) Dowload PDF
3D-STP data all dimensions Dowload
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