utilizes a MEMS-based monocrystalline silicon sensor combined with small welded remote flanges and dual capillary tubes filled with silicone oil to isolate the sensor from direct contact with the process medium. This configuration effectively prevents measurement errors caused by crystallization, vaporization, condensation, or fractionation in impulse lines. Designed to measure liquid/gas/steam pressure, flow, and level, it provides a stable 4–20 mA DC output signal and supports advanced configuration both locally and remotely. Key Specifications: • Core Function: High-accuracy differential pressure and liquid level measurement (liquid/gas/steam) • Sensor Technology: MEMS-based monocrystalline silicon chip; silicone oil-filled remote flanges • Output Signal: 4–20 mA DC (optional HART or RS485); two- or four-wire transmission • Operation: Local three-button LCD control or remote configuration via communicator/software/mobile app • Accuracy: ±0.2% FS (TD ≤ 10); ±0.02 × TD% (10 < TD ≤ 100) • Response Time: ≤0.2 s sensor damping; 0–60 s adjustable electronic damping; ≤5 s startup; ≤2 s data recovery • Range

utilizes a MEMS-based monocrystalline silicon sensor combined with a welded liquid-level flange and silicone-oil filling to isolate the sensing element from the process medium—preventing crystallization, solidification, vaporization, condensation or fractionation in the impulse line. It measures differential pressure, liquid level, flow and density of liquids, gases or steam, then outputs a stable 4–20 mA DC signal (with optional HART or RS485) without interruption during configuration. ​ ‌Key Specifications: • Core Function: High-accuracy differential pressure/level/density measurement (liquid/gas/steam) • Sensor Technology: MEMS monocrystalline silicon diaphragm with welded flange and silicone-oil filling • Output Signal: 4–20 mA DC two-wire; optional 4–20 mA+HART; RS485 four-wire • Operation: Local LCD & three-button control; remote configuration via communicator/software/mobile app • Flange Isolation: Prevents medium effects (crystallization, vaporization, etc.) on sensor ​ • Accuracy: ±0.2 % FS (turn-down ≤ 10 : 1); ±0.02 % × TD (10 < TD ≤ 100 : 1) • Measuring Range: –100 kPa…0.3

Models: MST22 Range: 6 kPa, 40 kPa, 250 kPa, 1 MPa, 3 MPa Accuracy: ± 0.075%F.S Diaphragm Material: 316L, Hastelloy C, Tantalum IP Grade: IP65

MST21 Monocrystalline Silicon Pressure Transmitter utilizes a high-precision MEMS sensor with a single-crystal silicon diaphragm to ensure excellent linearity, long-term stability, and fast dynamic response. It supports a wide turndown ratio (up to 100:1) and features a local display and control interface with reversible backlit LCD, making it highly adaptable for various measurement environments. The transmitter outputs a 4–20 mA signal (with optional HART or RS485), and supports full configuration via local buttons, remote communicator, software, or mobile app without disturbing the output signal. Key Specifications: • Core Function: High-accuracy pressure/level/density measurement for liquids, gases, and steam • Sensor Technology: MEMS-based monocrystalline silicon diaphragm; ±0.075%FS accuracy • Output Signal: 4–20 mA DC (isolated from configuration), optional HART or RS485 • Operation: Local three-button control or remote setup via software/communicator/mobile app • Display: Reversible backlit LCD; local zero/full span adjustment • Turn Down Ratio: Up to 100:1 • Response Time: ≤0.2 s sensor damping;