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Product
311 Series Submersible Hydrostatic Level Transmitter
- Product details
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Features & Applications
This transmitter delivers accurate measurement with excellent long-term stability, immune to fluctuations of external atmospheric pressure. It features superior sealing and anti-corrosion performance, complies with marine-grade standards, and can be directly immersed into water, oil and other liquids for long-term operation. The PTFE housing and dedicated cable enable full compatibility with various highly corrosive liquids.
Manufacturing Technology
The 311 Series Submersible Hydrostatic Level Transmitter adopts imported anti-corrosion diaphragm sensing components, with the chip assembled in a stainless steel (or PTFE) housing. The steel cap on the top protects the sensor while allowing the measured liquid to smoothly contact the diaphragm. The product is equipped with a specially designed ventilated cable, which keeps the back pressure chamber of the pressure sensing diaphragm well connected to the atmosphere.
Outstanding Features
1. Unique internal structural technology completely solves the condensation problem.
2. Specially designed electronic circuit technology fundamentally solves the lightning strike damage problem.
Customized model selection and detailed specification drawings are available upon request.
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Q
What is a thermocouple?
A
Thermocouples are the preferred solution for extreme temperature applications. They consist of two dissimilar metal wires joined at the measuring end, generating a voltage proportional to the temperature difference.
Working Principle: When two different metals are connected, the thermoelectric effect produces a voltage at the junction. This voltage increases with rising temperature, allowing measurement via reference tables.
Key Advantages:
• Temperature Range: -270°C to 2300°C (depending on type)
• Fast Response Time (typically 0.1–10 seconds)
• Robust Construction, vibration-resistant
• Relatively Low Cost
• No External Power Required
Q
What is the difference between RTD and thermocouple?
A
• RTD (Resistance Temperature Detector): Based on the principle that a metal conductor's resistance increases with temperature, it converts resistance measurements into temperature readings.
• Thermocouple: Operates on the Seebeck effect, where two dissimilar metals in contact generate a thermoelectric voltage proportional to temperature differences.
Features
• RTD: High accuracy, stable signal, excellent linearity, ideal for low to medium temperatures.
• Thermocouple: Simple structure, fast response, high-temperature resistance, wide measurement range.
Pros & Cons
• RTD Pros: High precision, strong anti-interference, reliable low-temperature performance.
Cons: Limited upper temperature range, bulkier size, slightly slower response.
• Thermocouple Pros: Broad temperature range, high-temperature tolerance, rapid response, suitable for moving/surface measurements.
Cons: Lower accuracy at low temperatures, requires cold junction compensation, weaker signal prone to interference.
