19mm Oil Filled Pressure Transmitter with 0.5-4.5V Output for Industrial

The HT19 is a 19mm silicon piezoresistive pressure transmitter sensor engineered for industrial level and pressure measurement. Built around a highly stable diffused silicon element, it delivers a standard 0.5–4.5VDC output through a precision amplifier circuit, making it a reliable core component for air compressors, refrigeration equipment, and a wide range of industrial process control systems.

The HT19 measures the pressure of liquids and gases by transferring pressure through a silicon diaphragm and a silicone oil diaphragm, effectively isolating the measured medium from the sensing element. A sophisticated amplifier circuit converts the signal into a stable 0.5–4.5VDC voltage output. This design ensures accurate, repeatable measurement across demanding industrial environments.

• Advanced manufacturing technology with a 316L stainless steel housing; diaphragm materials include titanium and Hastelloy for enhanced corrosion resistance.
• Thick-film circuits provide temperature compensation and zero-point stability.
• Outstanding reliability, repeatability, and long-term stability.
• Compact 19mm core size, suitable for integration into pressure transmitter and level transducer assemblies.

• Measurement of non-corrosive gas and liquid pressure compatible with 316L stainless steel.
• Industrial process sites including petroleum, chemical, metallurgy, power, and hydrology.
• Marine and aviation industries.
• Hydraulic and pneumatic control systems.
• Process control and automation applications.

• Pay attention to the fit between the core size and the transmitter housing during assembly to achieve the required air tightness.
• During housing assembly, ensure it is aligned vertically and apply even pressure to avoid jamming or damaging the compensation plate.
• If the measured medium is not compatible with the core diaphragm and the housing material (316L), special instructions should be provided when placing the order.
• Avoid pressing the sensor diaphragm with hands or sharp objects to prevent damage to the core due to diaphragm deformation or piercing.
• Keep the pressure port of the gauge pressure core open to the atmosphere and prevent the entry of water, water vapor, or corrosive media into the core negative pressure chamber.
• If there are any changes to the pin leads, follow the label on the actual core for reference.