
Generically known as Variable Area Flow Meters
- Simple & reliable.
- Give instant visual indication of flow.
- Mount in a vertical position only.
- Ideal for applications with clear, clean liquids, such as:
- Gland seal flows.
- Bearing cooling water flows.
- Analyser sample water flows.
- Can be fitted with switches for digital alarm outputs for high & low flow rates.
- Mercon meters come with solvent cement sockets sized to suit Australian pipe.
- BSP female threads are an available option.
- Manufactured from durable PVC materials.
- EPDM standard, or optional FPM (Viton) “O” rings.
- Short tube meters have a leader rod to stabilise the float.
Long Tube Flow Meter Size & Flow Rate

Short Tube Flow Meter Size & Flow Rate

ALARM OPTIONS
- ALo is a low flow alarm.
- AHi is a high flow alarm.
- 2AHL is a dual alarm for low flow & high flow.
- Alarm contacts are reed switches, rated at 100mA at 24VAC. Use interposing relays for high currents or voltages.
ORDER CODE EXAMPLE
VAF-25-H-S-2AHL
Is a 1″ NB (DN25) long tube flow meter, range 100 – 1000L/H with solvent socket connections & a dual alarm output for high & low flow rates.
We can offer meters in sizes up to 6″ NB (DN150) for flow ranges up to 200M³/H with flange connections & a choice of “O” ring materials. Please call to discuss your special requirements.

Phone 02 4351 4022