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Small Capacity Oval Gear PD Meters - Trimec

TF Series Small Capacity Flowmeter by TrimecTrimec-FP TF-series of Small Capacity Electronic Flowmeters

The Trimec series of small capacity electronic flowmeters are volumetric flowmeters are for the measurement of clean liquids or low flows.

Trimec's TF Series of Oval Gear PD flowmeters offer a high level of accuracy turndown & repeatability. These precision flow meters are used for flow rate measurement in flow monitoring & control application and for totalising in dispensing and batching. The micropulse gear meters are suitable for use with a wide range of clean liquids including:

  • viscous lubricants
  • chemicals
  • food bases
  • non-conductive low viscosity solvents either pumped or gravity fed.

Oval Gear Flow meters use two fine-toothed meshed gears that are oval in shape and engage each other in a precision machined body. This fluid is transferred sequentially from the inlet to the outlet and one or two pulses are transmitted for each revolution of the gear. Embedded within the gear are a pair of chemically resistant magnets provide the external signals. Detection of the rotation uses either a reed switch or a Hall effect sensor on the outside of the fluid housing. A choice of materials allows the meters to be used in a variety of corrosive applications.

These flowmeters are suitable for use in hazardous areas, while the basic meter is classed as simple apparatus, enabling use in monitoring flows of low viscosity hydrocarbons, fuels and solvents.

Meter Selection
Integral Instruments

Small Capacity Oval Gear PD Meter Features

  • High accuracy & repeatability, direct volumetric reading
  • No requirement for flow conditioning (straight pipe runs)
  • Stainless Steel rotors (Optional PPS Rotor for TF008 meter)
  • Measures high & low viscosity liquids
  • Quadrature pulse output option & bi-directional flow
  • Only two moving parts

Small Capacity Oval Gear PD Meter suitable Applications

  • additives for fuel
  • consumer products
  • water treatment & flotation cells
  • corrosion inhibitors
  • catalysts
  • emulsifiers
  • oils
  • grease
  • fragrances
  • adhesives
  • solvents
  • ink & insecticides.


Small Capacity Oval Gear PD Meter Meter Selection

Aluminium  meters
petroleum products including oils and grease, fuels and fuel oils.
Stainless steel meters
for the chemical, cosmetic, food and pharmaceutical industries & water based liquids.
Blind pulse meters 
available with reed switch & Hall Effect outputs. Optional Quadrature pulse & Integral 4-20mA outputs available. 


Small Capacity Oval Gear PD Meter Instruments

Options include integral LCD totalisers, flow rate totalisers adn batch controllers (4-20mA, scaled pulse, alarms and batch control)
  • BT LCD 5-digit reset, 8-digit cululative totaliser
  • RT14 LCD 8-digit reset, cululative totaliser, analogue and pulse outputs with backlit display
  • RT40 LCD 6-digit reset, cululative totaliser and flow rate. Backlit display
  • EB LCD 6-digit 2 stage batcher and cululative totaliser (available for remote mounting and with Intrinsically Safe [I.S] approvals)


Small Capacity Oval Gear PD Flow Meter Specifications

TF004 TF006 TF008
Normal size (mm) 4mm (1/8") 6mm (1/4") 8mm (3/8")
Nominal Flow range * @ 3cP
1 - 36 L/hr 2 - 100 L/hr 15 - 550 L/hr
(0.26 - 9.5 USG/hr) (0.5 - 26.4 USG/hr) (4 - 145 USG/hr)
Accuracy + 1% of reading (accuracy is + 0.2% of reading iwth optional RT12 / RT14)
Repeatability Typically + 0.03% of reading
Ambient Temperaure range -40°c to +120°c
Maximum pressure (AL metres) 15 Bar (220 psi)
Maximum pressure (SS metres) 34 Bar (495 psi)
Protection class IP68/67 (NEMA4X, Integral ancillaries can be suppplied intrincicall safe [I.S])
Recommended filtration 200 mesh (75 microns)


Output Pulse Resolution - Pulses per Litre (Pulses per USG) - Nominal

TF004 TF006 TF008
Reed switch 2800 (10600) 1050 (3975) 355 (1345)
Hall effect 2800 (10600) 1050 (3975) 710 (2690)
QP-Quadrature Hall effect 2800 (10600) 1050 (3975) 710 (2690)
RH (High Resolution) Hall effect 11200 (42400) 4200 (15900) N/A
Reed switch output 30Vdc x 200mA max. (maximum thermal shock 10°c / minute)
Hall effect output (NPN) 3 wire open collector, 5-24Vdc max., 20mA max.
Optional outputs 4-20mA, scaled pulse, quadrature pulse, flow alarms for two stage batch control
* Maximum flow is to be reduced as viscosity increases, see flow de-rating guide. Max. recommended pressure drop is 100Kpa. (14.5 psi)


Small Capacity Oval Gear PD Flow Meter Document Downloads



Flow Type: Liquid Flow Meters