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Vortex flow sensor 235
The flow sensors of Type 235 are based on the principle of the Kármán vortex street.
They differ from their counterpart, the Type 200, through their brass housing. The vortex flow sensors are free of moving parts, making them resistant to contamination. Furthermore, they are characterized by a low pressure drop and exceptionally high measurement accuracy.
Optional variants with an integrated temperature sensor are available.
- OEM product with very good accuracy
- Temperature-insensitive measuring principle
- Excellent media resistance (measuring element without media contact)
- Wider operating temperature range
- Low pressure loss
- Dirt-insensitive measuring element
- Temperature measurement directly in the medium optionally with PT1000 or NTC
- Drinking water approvals ACS, WRAS
Vortex flow sensor 235
Product feature
Flow measurement principle
Vortex flow rate
Measuring range flow rate Overview
0,9 ... 240 l/min
Nominal width
8; 10; 15; 20; 25; 32
Accuracy < 50 % measuring range end value Water
<1 %FS
Accuracy > 50 % measuring range end value Water
<2 % (Measured value)
Switch-on delay
<100 ms (Immediate response time; can be used for tapping operation)
Response time
>5 ms
Temperature measuring principle
PT1000; NTC10k
Temperature measuring range
-40 ... 125 °C
Repeatability
±0,5%
Sensor type
Flow sensor, optionally with temperature measurement
Measuring range flow rate
0,9 ... 240 l/min
Temperature measurement
Accuracy ΔT referred to 0 °C
±0,3K ± 0,005 · ΔT (Class B DIN EN 60751)
Accuracy @ T < 25 ºC
±0.7 °C ± 0.025 ΔT25 °C (NTC 10 kΩ @ 25 ºC)
Accuracy @ T > 25 ºC
±0.7 °C ± 0.025 ΔT25 °C (β = 4050)
Influence Self-heating temperature sensor
1 K/mW
Influence Conduction resistance to connector
0,8 Ohm
Field of application
Media
Heating water with standard additives; Drinking water; Other media on request
Medium temperature
-15 ... 125 °C (Non-freezing media)
Maximum test pressure at 40 °C media temperature
18 bar
Cavitation
>5,5 (Equation for avoiding cavitation: P abs outlet / P difference)
Maximum system pressure media temperature up to 90 °C
7 bar
Maximum pressure impact resistance at 90 °C media temperature
on request
Recommended minimum system pressure
1 bar
Material
Sensor paddle with media contact
ETFE
Housing with media contact
Brass (CuZn21Si3P); PA6T/6I (40 % glass fibre)
Sealing material with media contact
FKM; EPDM (perox.)
Electrical data
Supply voltage
5 VDC (±5%)
Output flow rate
Frequency square wave signal (< 0.1 ... > 4.75 V @ UIN = 5 VDC; Q; UOUT_Q_Frequency)
Temperature output
PT1000 (PT1000 Class B DIN EN 60751); NTC10k (NTC 10 kΩ @ 25 ºC; β = 4050)
Electrical connection
RAST 2.5 connector; Connector RAST 2.54; M12x1 connector
IP protection class
IP 20; IP 65
Load/burden
> 10 kΩ / < 10 nF (against GND or IN)
Current consumption
<6 mA (Standard); <10 mA (Interference resistant)
Approval
EMC compatibility
according to EN 61326-2-3 (without protection against surge)
Drinking water
Plastic parts with KTW and W270 approval; WRAS; ACS
Vortex flow sensor 235
Vortex flow sensor 235
Download the product-specific technical documents here in the language of your choice or open it in a new window . You can find all product and business-relevant documents on our central download page
.
EN-GB
Data Sheet 235
Data Sheet
PDF
EN-GB
Drinking water authorisation WRAS
Certificate
PDF
FR
Certificate 235 236
Certificate
PDF
Vortex flow sensor 235
Order number
Accessories
101817
RAST 2.5 connector
With cable; 110 cm; 3-pole
111668
RAST 2.5 connector
With cable; 30 cm; 3-pole
114563
Angled cable socket
for M12x1 connector; With cable; (with temperature output); 200 cm; 5-pole
114564
Straight cable socket
for M12x1 connector with cable; (with temperature output); 200 cm; 5-pole
114604
Angled cable socket
for M12x1 connector; With cable; 200 cm; 3-pole
114605
Straight cable socket
for M12x1 connector with cable; 200 cm; 3-pole
114629
RAST 2.5 connector
With cable; (with temperature output); 110 cm; 2x 3-pole
115024
Straight cable socket
for M12x1 connector with screw terminals; 5-pole