Product code: Uniflux

Product Overview

Uniflux direct reading flowmeters combine versatility, practicality and accuracy for the measurement of gas and liquid flowrates. They are available in standard, compact and long series as well as a range of materials and are suitable for panel or inline mounting. They offer either fine or ultrafine needle control valve options as well as high visibility and ease of installation. A wide range of standard and customised scales are available to meet even the most specific requirements. Please see Glass Tube Selection Table for information on standard flow ranges. Flow tubes are also available separately for integration into customer equipment.

Key Features & Benefits

  • Alarm options
  • High repeatability
  • Interchangeable tubes.
  • Low pressure drop

Typical Applications

  • General Plant Use
  • Laboratory Applications
  • Analytical Applications
  • Purging Services
  • Doping Gas control
  • Chromatography
  • Fuel flow indication
  • Gas measurements
  • Liquid measurements
  • Gas analysers

Typical Industries

  • Power plants
  • Paper and pulp industry
  • Chemicals industry
  • Oil and gas industry
  • Pharmaceutical industry
  • Medical technology
  • OEM
  • Educational Equipment


Gas Range 5 cm³/min to 120 L/min (Air equiv.)
Liquid Range 2 cm³/min to 4.4 L/min (Water equiv.)
Scale Length approx. max. 30, 100, 140 mm (Compact, Standard, Long)
Accuracy Class 4, 2.5*, 2.5% VDI/VDE 3513 (Compact, Standard*, Long)
* ± 2.5% FSD for ranges <= 250 cm³/min Air or <= 10 cm³/min Water
Flowrate Reading 'Top' edge of the Float @ middle of the Graduation Line
Repeatability Better than 0.5%
Temperature -15°C to 120°C
Pressure (Non Shock) 20 bar max.
Connections ¼" BSP Parallel Female

Standard Materials

Connections 316 Stainless Steel or Nickel Plated Brass
Seals Viton O-Rings, PTFE Valve Packing
Flow Tube Borosilicate Glass

Other Accessories Available

  • Flow Tubes

    Part number: Flowtube

    Part summary: Our Flow Tubes are available to buy separately from our units and are used in a large number of OEM applications. At Influx we hold stock of all our standard flow tubes for the most common liquids and gases under normal operating conditions. Details of our standard flow tubes can be found in the flow tube selection tables download on this page. In addition to our standard water and gases scales, we will produce scales to suit specific fluids, units of measure and operating conditions. Please enquire for more details about this service.

  • Lab Stand

    Part number: LabStand

    Part summary: The Lab Stand used with angled connections is ideal for use with our Uniflux VA flowmeters in laboratories and for other testing applications where panel mounting is not practical.

  • Flowsense Alarm

    Part number: Flowsense

    Part summary: These versatile infrared alarms are suitable for Uniflux & Fluxline frame types of direct reading flowmeters. They can be mounted to existing frames allowing upgrading in situ and can be simply adjusted to any points whether high, low or dual alarms. They offer infra-red detection and are insensitive to background levels. They also detect any power failure offering fail safe use.

  • Finetrim Valves

    Part number: Finetrim

    Part summary: Finetrim valves can be used to control both gas and liquid, offering multi-turn operation. They are available in a range of valve characteristics and have interchangeable cartridges.

  • Lab Kit

    Part number: LabKit

    Part summary: Our standard lab kit comprises a Uniflux frame, bench stand and several glass tubes and floats. They can be configured to suit the specific customer application needs.