Low-Flow Flow meter

When talking about small lines and low flow rates gas and liquid flow measurement, we have some reliable recommendations, such as mini thermal mass flow meters, low flow liquid turbine flow meter, metal tube Rotameter. See below general introductions for the rugged low flow meters also at low price cost.

Low flow mag meters -Strong corrosive liquid flow measurement

Low flow mag meters can handle liquid flow as low as to 330 ml/min (min flow rate 0.09GPM), the mini mag flow sensor size we can provide is 1/8”,1/4”,3/8”,1/2”,3/4”. Micro flow magnetic flow meters are used widely in chemical or fertilizer injection industries.it can measure strong aggressive and corrosive liquid, such as HCL, H₂SO₄,  caustic soda,  Phosphoric acid, hydrofluoric acid (HF acid),nitric acid.,etc
Flow range and Size

Size mm   size (inch)    Flow range( m3/h)         Flow range(GPM)

4mm         1/8”         0.02-0.4m³/h              0.09- 1.76 GPM

6mm         1/4”         0.05-1 m³/h               0.22-4.4 GPM

10mm       3/8”         0.14-2.7 m³/h             0.62-11.89 GPM

15mm       1/2”         0.3-6 m³/h                1.32-26.42 GPM

Micro type Low flow Thermal Mass Flow meter-Gas &air flow measurement

It employs the thermal dispersion principle whereby the rate of heat absorbed by a gas or air flowing in a closed pipe or duct is directly proportional to its mass flow passing.

Thermal flow meters are frequently used for the regulation of low gas flows or air flow, It is a kind of gas flow controller.

Features:

✔ Low Gas flow range:
✔ Digital display of gas volume flow and mass flow measurement, flow velocity
✔ 4-20mA, pulse and RS485 communication
✔ Gas flow measurement without external temperature and pressure compensation
✔ High accuracy: ± 1 ~2.5 %

Micro oval gear flow meter  -High viscosity and low flow rate measurement

Features

✔ High accuracy: +/-0.5FS
✔  Fluids temperature: -30~80℃,optional high temperature
✔ Operation pressure: 5Mpa, optional high pressure
✔ Output: pulse output (hull or Reed Switch)
✔ Max frequency: 0.03 ml/p
✔ Power supply: 4-26V DC
✔ Process connection: stainless steel 316L
✔  Material: stainless steel 316L or anodized aluminum

Metal Tube Rotameter for small flow measurement-Gas ,liquid measurement

Metal tube rot meter is a kind of variable area (VA) flow meter; Rotarmeter is with a tapered tube, a float and scaled indicator, measured medium flow raises a float in the tapered metal tube, adding the area for passage of the fluid

Features:
✔ Low flow range

Water (L/h)			Air (m3/h)	Vertical Mounting Max Pressure los
Diameter	Float No.	Flow range	@0.1013MPa 20°C	Water (Kpa)	Air (Kpa)
Measuring tube 15 mm	H15.1 H15.2 H15.3 H15.4 H15.5 H15.6 H15.7 H15.8 H15.9	1.6~16 2.5~25 4.0~40 6.3~63 10~100 16~160 25~250 40~400 63~630	0.05~0.5 0.07~0.7 0.11~1.1 0.18~1.8 0.28~2.8 0.48~4.8 0.7~7 1.0~10 1.6~16	2.0 2.3 2.5 2.5 2.5 2.6 2.7 2.9 3.4	7.0 7.2 7.3 7.5 7.8 8.0 10.0 10.8 14

✔ Can work for small flow measurement of gas and liquid
✔ Mechanical type pointer to show instant flow, do not need external main power
✔ Metal tube variable area flow meter option with transmitters to have analog outputs
✔ Vertical mounting and horizontal mounting options
✔ With alarm contact outputs for flow controlling processes purpose
✔ Option with different material, even supply VA rotameter with PTFE lined material for corrosive liquids and gases measurement

Low Flow Liquid Turbine Flow meter-clean liquid measurement

It is only dedicated to measure clean and not corrosive liquids, cannot measure gas.Perfect choice low flow meter for oil.

Miniature turbine flow meter is suitable to measure clean and non-corrosive liquids

✔ Flow range

Flow range	Flow sensor size	Flow (L/min)	K factor (cm3/imp)
	1.15mm	0.035~1.6	0.50
	1.3mm	0.01~1.86	0.60
	1.5mm	0.045~2.08	0.67
	2.0mm	0.085~2.32	1.02
	2.5mm	0.12~2.4	1.44
	3.7mm	0.15~3	2.28

Coriolis flow meter for low flow fluids measurement-liquid ,gas and steam measurement

Coriolis meter can measure liquid, gas and steam; it can have mass flow, temperature and density measurement by one flow sensor. It can have small sizes low to DN1.5-DN8 size.

Features

✔ Flow range:

DN	Flow Range	Operation Pressure	Process Connection
1.5	0~4 kg/h	0~32 Mpa	Weld Joints Φ6×1.5
3	0~40 kg/h	0~32 Mpa	Weld Joints Φ6×1.5
6	0~100 kg/h	0~25 Mpa	Weld Joints Φ10×2
8	0~200kg/h	0~20 Mpa	Weld Joints Φ10×1

✔ High Flow Accuracy: ±0.2%~±0.1%

✔ Medium Temperature range:-50°C~ +350°C,

✔ Analog outputs, frequency outputs, RS485 Modbus RTU and Hart Protocol