We’ve used ADT across a few different projects. What keeps us going back is they actually know how our sites work, and work with us to find the best solutions.
AIR Measurement technology
VA 500 – Flow sensor for compressed air and gases
RS 485 interface, Modbus RTU, 4…20 mA analogue output for m³/h, Pulse output for m³.
- RS 485 interface, Modbus-RTU as a standard
- Option integrated display for m³/h and m³
- Usable from 1/2“ to 12“ (DN 300)
Product detail
Everything you need to specify
The integrated, precise differential pressure sensor measures the differential pressure/ dynamic pressure at the sensor tip. The pressure depends on the respective gas velocity. The flow is therefore easy to determine by means of the pipe diameter.The additional measurement of temperature and absolute pressure and calculation of the relevant density means that measuring can be carried out for various gases, a wide variety of temperatures and pressures.
Field of application:
- Easy installation under pressure
- 4…20 mA analogue output for m³/h resp. m³/min
- Pulse output for m³
- Inner diameter adjustable via keypad
- Consumption counter resettable
- Adjustable values at the display of the flow sensor: Reference conditions, °C and mbar, 4…20 mA scaling, pulse weight
Typical applications:
- FAD measurement of compressors
- Compressed air audits
- Efficiency measurement of compressed air systems
Benefits
- Particularly suitable for extremely high flow rates
- Extremely fast response time: 100 ms
- Flow, total consumption, temperature and pressure
- Measurement at high temperatures, max. temperature 200 °C
- Measurement in various gases by selecting gas type, on request
- Can be used in pipes from DN 20 to DN 500
- Installation via 1/2″ ball valve under pressure
- RS 485 interface (Modbus-RTU), 4…20 mA, pulse output as standard
THE FINER DETAILS
Technical Specifications
Division
Air Measurement
Brand
CS Instruments
Sensor
Thermal mass flow sensor
Measured medium
Air, gases
Operating temperature
-30…110 °C sensor tube
Operating pressure
-1…50 bar (for pressure > 10 bar
Digital output
RS 485 interface, (Modbus-RTU)
Analogue output
4…20 mA for m³/h or l/min
Supply
18…36 VDC, 5 W
Burden
< 500 Ω
Housing
Polycarbonate (IP 65)
Sensor tube
Stainless steel, 1.4301
Mounting thread
G 1/2″, G 1/2″ NPT male thread
Mounting position
any
Ø housing
65 mm
Why it matters
Clean, dry air pays back
The right filtration and drying shows measurable returns across the whole facility.
– Air loss
20-30%
Reduction in total air loss when leaks are properly sealed and repaired.
British Compressed Air Society
– ENERGY SAVINGS
~7%
Energy savings per bar of pressure drop recovered when filters are clean & dryers cleared
Hayley Dexis
– ELECTRICITY REDUCTION
10-15%
Electricity reduction as compressed air accounts for up to 30% of a facility’s total electricity bill
British Compressed Air Society
– INCREASED LIFESPAN
20-30%
Increase in the lifespan of pneumatic tools. Clean, dry air prevents this internal wear and tear.
Alup Kompressoren
All statistics have been researched and reported within reputable industry reports.
OUR Accreditations
WHAT WE DO
Find us by service or sector
Total care
More than a supplier – we’re a service partner
We provide complete sales and service support on all types of compressed air and gas treatment equipment. Our primary function is on‑site servicing of desiccant and refrigerant dryers, filtration and condensate management.
This includes
- Total Care Contracts
- Maintenance Contracts
- Call‑out servicing
- Trouble‑shooting service
- Operational advisory service
- Air Quality Testing
We also provide rental equipment
Whether you’re managing planned system maintenance, expanding temporary capacity, or facing an emergency breakdown, ADT provides short- and long-term rental units designed for immediate deployment.
Learn more about our financing options
ADT provide attractive finance deals to give you different options to pay for your equipment, including hire purchase and fixed-term rental options.
In our clients’ words
Trusted on the plant floor for a decade
Project Engineer, Waste Management
Didn’t realise how much our old system was costing us until ADT came in and did an assessment. The retrofit paid for itself faster than we expected.
Engineering Technician, Pharmaceutical Manufacturing
ADT continues to be a trusted partner of ours, consistently delivering reliable service and exceptional support whenever we need it.
Mechanical Planner, Cement Works & Quarry
We have worked with ADT for over 10 years and deeply appreciate their unparalleled understanding and industry expertise.
Technical Engineer, Nuclear Power Station
OUR CLIENTS
