SCHMIDT® Bluetooth® Verification Probe SS 20.450

Verify flow sensors on site


  • Simple, fast and safe verification of installed sensors – mobile on site
  • Easy-Clamp-On-Installation
  • Plug-and-Play
  • No additional power supply required
  • Radio module with Bluetooth® technology for transmission of the standard flow rate wN
  • Display and real-time recording of the measured values via the free SCHMIDT® Sensor App on a mobile Android end device – wirelessly, anytime and anywhere


Particularly in clean rooms or in clean processes, installed flow sensors should be verified on site from time to time. This can now be realised in the simplest way with the SCHMIDT® Bluetooth® Verification Probe SS 20.450.


The SCHMIDT® flow sensor remains in place and the Verification Probe is easily attached to the flow sensor using the metal clip supplied. The Verification Probe has a self-sufficient power supply and can therefore be operated completely wirelessly for up to 8 hours.


This makes it possible to check the sensor without having to remove it from the clean area and then clean it at great expense. The system operator can now verify the sensor with his SCHMIDT® Sensor App installed on the mobile Android device, have the real-time measurements displayed graphically on the smartphone or tablet and record the values (data logger function).


SCHMIDT® smart solutions mit Bluetooth® Technologie


Scope of delivery:

  • SCHMIDT® Bluetooth® Verification Probe SS 20.450
  • SCHMIDT® Bluetooth® Modul BT 10.450
  • Easy-Clamp-On Metall-Clip
  • Batteries LR44
  • Instruction manual
  • Calibration certificate
  • Certificate of compliance
  • Storage case


Technical data
Additionally required deviceMobile device, e.g. smartphone, tablet
System requirements:
- Android® version 7.0 or higher
- Bluetooth® version LE (4.0) or higher
For the use of the full functionality
functionality of the SCHMIDT® Sensor App for Android an active
an active internet connection is required.
Bluetooth® RangeMax. 50 m (free field; less in buildings)
Display and recordingStandard flow velocity wN
über kostenfreie SCHMIDT® Sensor App
MeasurandStandard flow velocity wN of air, based on standard conditions of TN = 20 °C and pN = 1013.25 hPa
Measured mediumClean air
Measuring range wN0 … 1 / 5 / 10 m/s
Lower detection limit wN0.05 m/s
Measuring accuracy wNRange = 1 m/s: ±(1 % of reading + 0.025 m/s)
Range > 5 / 10 m/s: ±(2 % of reading + 0.8 % of range)
Response time (t90) wNApprox. 5 s
Material sensor headStainless steel 1.4404
Material sensor tubeStainless steel 1.4404
Material SensorelementGlass, epoxy resin
Operating temperature0 … +60 °C
Storage temperature-20 … +85 °C
Power supplyIntegrated batteries (3 x LR44), changeable
DimensionsSensor probe: L = 150 / 193 mm; Ø 9 / 12 mm
BT-module: L = 93 mm; Ø 18 mm
Funkmodul: L = 90 mm; Ø 18 mm
Weight84 g (incl. mounting bracket and batteries)

Subject to technical changes.

Order information

 DescriptionArticle number
BasissensorSCHMIDT® Bluetooth® Verification Probe SS 20.450 measuring range 0 … 1 m/s563 540 - 1
SCHMIDT® Bluetooth® Verification Probe SS 20.450 measuring range 0 … 5 m/s563 540 - 2
SCHMIDT® Bluetooth® Verification Probe SS 20.450 measuring range 0 … 10 m/s563 540 - 3
SCHMIDT® Bluetooth® Verification Probe SS 20.450 measuring range 0 … 20 m/s563 540 - 4


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