Compact Flowmate & Super Micro
The Flowmate and Super Micro Flowmate from OVAL are compact positive displacement flowmeters designed for precise small and ultra-small flow measurement. Equipped with a built-in pulse transmitter, they provide robust, low-cost performance and are ideal for monitoring fuel consumption in burners, heaters, and fuel cells, as well as chemical and food additive dosing. With accuracy of ±1.0% RD and measurement capability down to 1.5 mL/min (38 model), they support a wide range of applications in research, energy, and industrial processes.- Compact flow meter with built-in pulse generator
- Simple, robust, and cost-effective design
- Suitable for centralized display and monitoring as a fuel meter for burners/heaters or as a totalizer for small flow rates
- Can be combined with valves or pumps for compact proportional injection and flow control of chemicals or food additives
- Ideal for ultra-low flow measurement, such as in fuel cell applications (Model 38 can measure from as low as 1.5 mL/min)
- High accuracy: ±1.0% RD (Models 40, 41, 45)
- Water
- Gasoline
- Kerosene
- Diesel Fuel
- Heavy Oil
- Others
| Model | Type 38 | Type 39 | Type 40 | Type 41 | Type 45 | ||
| Connection | R1/4 | Rc1/4 | Rp1/8 | Rp1/8 | Rp1/4 | ||
| Flow Range (L/h) | 0.09–3 | 0.12–6 | 0.5–50*1 | 1–100*1 | 2.5–500*1 | ||
| Operating Temperature Range | –10 to +60°C | –20 to +80°C | |||||
| Max Operating Pressure | 0.3 MPa | 0.49 MPa | 0.98 MPa | ||||
| Accuracy | ±3% or within ±10% of indicated value | ±3% or within ±8% of indicated value | Within ±1% of indicated value | ||||
| Power Supply | DC Power | ||||||
| Output | Pulse | ||||||
| Structure | Non-explosion-proof | ||||||
| Applicable Fluids | Water*2 | Water, oil, others | |||||
*1: For fluids with viscosity between 5 mPa·s and less than 1000 mPa·s
*2: For fluids other than water, please contact us


