Comparison of transformer oil level gauge types: pointer type, remote transmission type and intelligent oil level monitoring
Date: June 3, 2026 02:12:02
- Analogoil level meter: The YZ series uses a float-and-linkage mechanism to drive the pointer, indicating the oil level in the oil reservoir. With its simple design, no power supply required, and reliable operation, it is suitable for on-site oil level indication in the vast majority of oil-immersed transformers.
- Remote oil level meter: By adding an angle sensor or potentiometer to a pointer-type oil level gauge, the oil level is converted into a 4–20 mA or RS-485 signal for transmission to the control room. Models include the YZF3-200.
- Smart Oil Level Monitoring: By continuously monitoring oil levels online and feeding the data into an integrated monitoring platform, the system enables trend analysis of oil levels, out-of-limit alerts, and correlation analysis with other monitoring data.
1. Comparison of Three Options
| Plan | Applicable Scenarios | vantage | limitation |
|---|---|---|---|
| Analog | All oil-filled transformers | Reliable, battery-free, long-lasting | Local instructions only; no remote signals |
| Remote | Transformers requiring remote monitoring | Dual functionality: on-site and remote | Electronic components require power and maintenance |
| Smart Monitoring | Main Transformer | Trend Analysis + Smart Alerts | Requires backend system support |
2. Selecting a Model from the YZ Series
The YZ series of pointer-type oil level gauges offers a comprehensive range of models to accommodate oil storage tanks of various sizes. Common models include YZF2-140TH, YZF2-200, YZF3-200, YZF2-250, and YZS2-250. The numbers in the model names indicate the applicable storage tank diameter; select the appropriate model based on the dimensions of the storage tank.
3. Frequently Asked Questions FAQ
3.1 Q: Do all transformers require remote oil level gauges?
A: No. For standard distribution transformers, a pointer-type oil level gauge is sufficient for on-site inspection. Remote transmission capabilities are primarily required for unmanned substations or critical transformers connected to integrated monitoring platforms.
3.2 Q: Can an existing pointer-type oil level gauge be retrofitted for remote transmission?
A: Some models support the installation of a remote transmission module. However, before making any modifications, you should verify whether your existing oil level gauge has a remote transmission interface. If the original model does not support this feature, it is generally more reliable to replace it with a model that does.
3.3 Q: Is the accuracy of the remote signal affected by temperature?
A: Electronic sensors may experience some drift under extreme temperatures. Select a remote-sensing model with a temperature range that matches the installation environment.
Disclaimer: The content of this article is for technical exchanges and reference only, and does not constitute any form of procurement commitment or contract offer. Product technical parameters, configuration programs and prices are subject to the actual signed contracts and technical agreements.
Need a technical solution? Welcome to contact Inotera for one-on-one professional support. Service Hotline: 13959168359 (Wechat with number).
