Universal air flow sensor SS 20.250
Compact, universal air flow sensor to measure air flow speed and air flow volume/with dumbbell head technology/ measurement in dust-laden gas performable

With this device a universal air flow sensor for direct measurement of the air flow speed and of air flow volume in different gas types is provided. The compact design of the universal air flow sensor allows an easy installation of the little all-rounder. Due to the innovative dumbbell head technology, positioning the universal air flow sensor is even at large upstream flow angle (axial ± 45°; radial: 360°) possible. Throughout the temperature range (-20…+70 °C) the lower detection limit of the speed lies around 0.06 m/s, measurable are air flow speeds up to 20 m/s. With an optional purchasable protection cover the universal air flow sensor is even applicable in aggressive mediums like salt or sulphuric acid. Furthermore aside from diverse equipment parts, available on demand is an ISO calibration certificate for documentation of measuring accuracy of the universal air flow sensor. Therefore this device is especially applicable for checking, controlling and monitoring of aerators, filter elements and suction plants in areas of ventilation and climate technologies or in the pharmaceutical industry.  For further information about the Universal air flow sensor SS 20.250, please read the following technical data or call our Hotline: +44 (0)2380 987030. Our engineers and technicians will gladly advise you with the Universal air flow sensor SS 20.250 or all other products in the terms of regulation and control, scales and balances of PCE Instruments.

- Operation indicated by duo-LED
- Atmospheric operating pressure 
- Measuring range up to 20 m/s
- Optional protection cover

- Even for aggressive gases 
- Sensor head made of PBT
- Sensor tube made of stainless steel 
- Problem-free cleaning 

Technical data about universal air flow sensor 

Measure variable  

Proper speed wN based in standard conditions with 20 °C and 1013.25 hPa, 
Medium temperature TM 

Test medium 

Air or azote, further gasses on order 

Measuring range air flow wN 

0…1/ 10/ 20 m/s 

Lower detection threshold wN  

0.06 m/s

Measuring range temperature TM  

-20…+70 °C

Measuring accuracy 

Standard 

 ± (5 % from avrg. + [0.4 % from measuring range; min. 0.02 m/s])

High precision (option)  

± (3 % from avrg. + [0.4 % from measuring range; min. 0.02 m/s])

Reproducibility wN:

± 1.5 % from measuring value

Response time t90 wN

3 sec. (jump from 0 to 5 m/s air) 

Temperature gradient wN

< 2 K/min @ 5 m/s

Measuring accuracy TM 

± 0.4 K (10 ... 30 °C)
± 1 K remaining measuring range 

Operation temperature 

Measuring sensor and electronics 

-20 °C...+70 °C

Storage temperature

-30 °C…+85 °C

Material  

stainless steel 1.4571

PBT fibre-glass reinforced, aluminium anodised

PUR halogen free

General data 

Medium, environment 

Non-condensing (up to 95% RH)

Operation pressure 

Atmospheric (700…1300 hPa) 

Display

Duo LED green/red 

Voltage Supply  

24 V AC/DC ± 10 %, max. 100 mA 

Charging rate 

Type < 60 mA 

Output signal for 
temperature and air flow Auto U/I 

0…10 V/4…20 mA (protected from short-circuit) voltage output: >500 Ω, 
current output: <500 Ω, 
hysteresis: 50 Ω 

Connection 

Plumbed cable, 5- pole, length 2 m 

Permissible conductor length

100 m max

Installation position  

Arbitrary 

Min. submergence 

58 mm (< 58 mm on demand) 

Protection type/ Protection class  

IP 65 / III

Sensor length

300/ 500 mm

Weight

200 g max

Delivery content of universal air flow sensor  

1 x universal air flow sensor (depending on model), 1 x instruction manual 

Purchasable equipment for universal air flow sensor 

Through bolt made of stainless steel (art. nr. 301082), atmospheric pressure 

Through bolt made of brass (art. nr. 517206), atmospheric pressure 

Mounting flange (art. nr. 301048) 

Welded sleeve (art. nr. 524916 (steel) or art. nr. 524882 (stainless steel) 

Contact:
PCE Instruments UK Limited
Unit 11 Southpoint Business Park
Ensign Way, Southampton
United Kingdom, SO31 4RF
Phone: +44(0) 23 809 870 30
Fax: +44(0) 23 809 870 39

Contact:
PCE Americas Inc.
1201 Jupiter Park Drive, Suite 8
Jupiter 33458 FL
USA
Phone: +1-410-387-7703
Fax: +1-410-387-7714

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