Mechanical oil gauges, when correctly installed as per requirements, ensure sufficient accuracy when measuring diesel flow rates. Typically, the accuracy of cumulative values can reach 0.5 grade, making it a relatively accurate flow measurement instrument. However, if the flow rate of the medium being measured is too low, the impact of leakage error in the instrument becomes pronounced, and it can no longer guarantee adequate measurement accuracy. Therefore, different models and specifications of diesel flow meters have an allowable minimum flow rate. Measurement accuracy can only be ensured when the actual measured flow rate exceeds this lower limit allowable value.
Installation Environment Requirements for Mechanical Oil Gauges:
1. Opt for locations with minimal dust, no corrosive gases, minimal vibration, and a good distance from heat sources whenever possible.
2. The flow meter installation environment temperature is -15 to 40°C.

Technical requirements for mechanical oil gauge installation:
1. The elliptical gear flowmeter has no specific requirements for the upstream and downstream straight pipe sections. It can be installed horizontally or vertically, with the rotation axis of the flowmeter's elliptical gears kept parallel to the ground during installation.
2. During on-site installation, pay attention to the arrow direction on the flowmeter housing and the flow direction of the fluid.
3. The fluid being tested should not contain any particles or impurities. Otherwise, a filter must be installed before the flowmeter's inlet. If the fluid contains a large amount of debris, the filter diameter should be one size larger than the standard or a parallel double filter should be installed. If gas is present, an exhaust device should be installed.
4. The fluid under test should fill the measuring chamber of the flowmeter and its connecting pipes in front and behind. If the fluid contains gas, a gas separator should be installed before the flowmeter and filter.
5. The flow meter is installed on a pipe with a nominal inner diameter identical to that of its inlet and outlet connections. When connecting the pipe to the flow meter, the sealing components should not protrude into the fluid.
6. For continuous-running pipelines, a bypass pipeline should be installed when a flow meter is mounted on a horizontal pipe to facilitate cleaning and maintenance; when the flow meter is mounted on a vertical pipeline, it should be installed in the bypass pipeline to prevent debris from falling into the instrument. When the fluid flows from bottom to top, the vertical pipe above the flow meter should be as short as possible to minimize sedimentation of impurities in the upper piping.

Primary Function of Mechanical Oil Gauge:
1. This product combines liquid level detection and display in one, requiring no external devices and can directly show the liquid level. Easy to install, it is widely used on fuel tanks, diesel tanks, hydraulic stations, and water tanks of various generators and engines, but is not recommended for use in vehicles.
2. Threaded connection type: M45*2 or BSP 1 1/2 NPT 1 1/2
3. Standard Flange Type: Standard 6-Hole Flange or Welded Flange
4. Optional liquid level alarm function;
5. This product comes in standard lengths of 120~740mm, with custom lengths available upon customer request.
6. Operating Temperature: -40°C to +80°C
7. Display Accuracy: 5%
8. Torque Tightening: 300-400 N·m
9. Length Range: 100mm - 1500mm, lengths can be customized to customer requirements; topside with gauge, pointer indicates liquid level.
10. Signal Output: Optional, capable of outputting 9 resistive signals with resistance values customizable according to customer requirements.
11. Alarm Switch: Optional, available with high or low alarm settings. Alarm current less than 500mA. Alarm points can be set at 9/10 and 1/10 positions.
The mechanical oil gauge is a traditional type that uses a float inside the fuel tank and a cable to sense the fuel level, which is then reflected on the dashboard via a gauge needle. It operates without power and can be customized with high and low level alarm features as per customer requirements. The mechanical oil gauge is a simple tool for checking hydraulic system pressure, featuring a hollow, curved spring tube, pull rod, rack, gear, needle, and damping mechanism inside. When checking the oil pressure with the mechanical oil gauge, it should be positioned vertically with the line of sight perpendicular to the gauge face to accurately read the pressure value.
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