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Volume flow indicator  / monitor / transmitter 

SENSO-X®

 VPX

Sensors PG1  |  Data sheet No. 13170  |  Version 03-2020  | 

1

 | 

6

• 

Large LCD display

• 

 Volume flow up to 99,999 displayed in  

numerals or as an indicator bar in any of the 

following units: m³/h, l/s, ft³/min

• 

Limit displayed up to max. volume flow

• 

Working range displayed (Range max)

• 

 Three-color LED: red for limit value undershoot, 

yellow for fault and green for overshoot

• 

Temperature / Absolute pressure transducer

• 

 NFC parametrisation of limit, range max,  

signal range for analog output, K-factor and 

air density ρ

• 

Optional Modbus output

• 

Power supply: 24 V AC at 50 / 60 Hz or 24 V DC

• 

Available in two built-in and one surface-  

  mounted versions

Technical data

Housing:

 

high impact ABS

Front panel color:

 

antique white

Lower housing color:

 anthracite

Protection class:

  

surface-mounted type (AP) IP 65 
built-in type IP 54 / 
built-in type  with additional sealing 
(accessory) IP64

Operating temperature:

  -20 °C to 65 °C

Storage temperature:

 

-20 °C to 70 °C

Relative humidity:

 max. 

95 % non-condensing

Front cover dimensions
- square:

 

182 x 140 x 21 mm [L x W x H]

- round:

 

143 mm Ø

Dimensions of 
surface-mounted type: 

165 x 71 mm [Ø x T]

Hose connection:

 

2x 6 mm Ø

Working and 
measuring ranges:

 

see table

Working range:

 

adjustable via keys and NFC tool

Burst pressure:

 

 20 kPa (VPX1000) 
40 kPa (VPX4000)

Protection class:

 

II (IEC 60536)

Error margin:

 

+/- 1 % of measuring range 
(@ -5 to 65 °C)

Power consumption:

 

24 V DC 41 mA 
24 V AC 81 mA

Long-term stability:

 

≤ ± 0.5 % FS/a

Supply voltage:

 

 13.5 – 36 V DC or 
13.5 – 30 V AC at 50/60 Hz

Output analog:

 

linear 0 – 10 V (max. 0.1 mA) or  
4  – 20 mA (max. load 600 Ω).

Output digital:

 

relay (250 V AC 6 A, 30 V DC 5 A),  
changeover switch, closed-circuit 
principle, freely selectable limit value. 
Modbus optional.

Cable gland:

 M16 

Cable connection:

 

Spring terminals 0.2  – 1.5 mm²

Installation 

All work (such as installation, electrical connection, startup, ope-
ration, and maintenance) must only be performed by sufficiently 
qualified tradesmen. The respectively applicable local rules and 
regulations (e.g. national building codes, electrical/VDE regula-
tions, etc.) must be observed. Installers and operating entities 
are required to sufficiently familiarize themselves before startup. 
Read the product description before operating the equipment. 
Verify that the product can be used for the relevant application 
without restrictions. We are not liable for printing errors and 
changes after printing. Appropriate use implies compliance with 
operating and installation instructions. We are not liable for losses 
due to inappropriate use. Unauthorized or inappropriate mani-
pulations or modifications of the device render the operating 
permit, the product warranty and warranty claims null and void. 

Types

Type

Type

Measuring 

Measuring 

range

range

Working range 

Working range 

(output signal)

(output signal)

Units of 

Units of 

measure / 

measure / 

output*

output*

Limit value 

Limit value 

monitoring

monitoring

VPX1000

0 – 1,000 Pa

0 – 99,999 m³/h

freely adjustable in  

1 m³/h-increments

m³/h, l/s, 

ft³/min

Freely selectable.  

LED/bar -ind 

switching output for 

undershoot

VPX4000

0 – 4,000 Pa

0 – 99,999 m³/h

freely adjustable in  

1 m³/h-increments

m³/h, l/s, 

ft³/min

Freely selectable.  

LED/bar -ind 

switching output for  

undershoot

* analog output 0 – 10 V or 4 – 20 mA linear depending on selected working range and unit of   

   measure.

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