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HUBA CONTROL
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Vortex flow sensor OEM Flow sensor for liquid media Type 235 The type 235 is based on the type 200 but incorporates a brass housing. The flow sensor type 235 is based on the Kármán vortex trail. You can choose between various versions as integrated temperature measurement. With no moving parts the flow sensor is not sensitive to debris, has marginal pressure loss and high accuracy. + Low cost product with high levels of accuracy + Temperature non-sensitive measuring principle + Excellent media resistance (measuring element not in contact with the media) + Wide application temperature range + Marginal loss of pressure + Measuring element not sensitive to debris + Direct temperature measurement in the medium with PT1000 or NTC + Drinking water approval ACS, WRAS Huba Control Type 235 | Technical data subject to change | Edition 09/2020
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Technical Overview Flow measurement Measuring principle Vortex Measuring range Nominal diameters Accuracy at < 50% fs (water) Accuracy at > 50% fs (water) Immediately Signal delay Response time Therefore suitable for spigot use. Response time Temperature measurement Measuring principle Resistance Measuring range @ T = 0 ºC PT1000 Accuracy Class B DIN EN 60751 @ T ≠ 0 ºC Measuring range @ T = +25 ºC NTC 10 kOhm @ 25 ºC NTC @ T < +25 ºC Accuracy β = 4050 @ T > +25 ºC Self-heating at temperature sensor Temperature influences Conduction resistance to connector Piezoelectric sensor element 0.9...
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Nominal diameters dependent variables Nominal diameters Tube connection Measuring range Flow rate Frequency range Characteristic line formula frequency output QV = Kf * ƒ + Q0 Legend Volume flow rate [l/min] QV Axis intercept [l/min] Q0 Coefficient frequency output [(l/min) / ƒ] Kf ƒ Frequency [Hz] quantity litres Quantity per pulse pulse pulse Formula quantity per pulse [litres/pulse] quantity QV * Kf = pulse 60 * (QV - Q0) Order code selection table 235. X X X X X X X Version Flow 9 Flow and temperature (PT1000) 8 1 Flow and temperature (NTC) 7 1 DN 8 0.9 ... 15 l/min. 0 8 DN 10 1.8 ......
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Tube mounting instructions Consider the following to ensure the correct function of the sensor. • Only diameter changes from large to small are allowed. • Avoid repeated elbows in the same level at entryside minimum 5xDN for alternative elbows minimum 0.5xDN for recommended 90º elbow with min. R 1.8xDN Electrical connections Connector M12x1 without temperature output RAST 2.5 without temperature output Connector M12x1 with temperature output Connector 2x3-poles with temperature output Pin Colour 1 brown 3 blue 1 4 black Ω Huba Control Type 235 | Technical data subject to change
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With the following definitions we are able to correct the influence of media with higher viscosity than water (= media viscosity > 1.8 cST) in order to reach 0 a measuring accuracy of 3% fs in the range of 1.8 - 4 cST and of 4% in the range of 1 - 14 cSt3(υ = 4 4 2 viscosity 6 cSt). 8 in 7 5 9 10 11 12 13 14 Viskosität in cSt Minimal detektierbarer Durchfluss Definition of viscosity of glycol-water-compound Kinematische Viskosität Propylenglykol‐Wasser Kinematic viscosity propylene glycol water Minimaler Durchfluss in l/min 25 Kinematische Viskosität Ethylenglykol‐Wasser Kinematic viscosity...
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Huba Control AG Headquarters Schweiz Industriestrasse 17 CH-5436 Würenlos Telefon Niederlassung Deutschland Vestiging Nederland Succursale France Branch Office United Kingdom Unit 13 Berkshire House, County Park Technopôle Forbach-Sud Business Centre, Shivenham Road
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