MST21 Monocrystalline silicon pressure transmitter
This pressure transmitter is widely used for pressure measurement in industrial sites such as petroleum, chemical, power, and hydrology.
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; configurable electronic damping 0–60 s
• Environmental Ratings:
– Ambient: –40 to +85 °C
– Medium: –20 to +70 °C (with display)
– Protection: IP65; explosion-proof version ExdIICT6 available
• Electrical Options:
– Supply: 12–36 VDC
– Alarm Modes: High (20.8 mA), Low (3.8 mA), Hold
• Process Connections: M20×1.5, G1/2, NPT1/2, others available
• Diaphragm Materials: 316L, Hastelloy C, Tantalum
• Range Options: From 200 Pa to 10 MPa, including gauge and absolute pressure types
• Stability: Annual drift ≤ ±0.2%FS
• Installation: Any orientation, max zero offset 400 Pa (correctable)
Typical Applications:
✔ Liquid/gas/steam level and density monitoring in tanks or pipelines
✔ Industrial process control (petrochemical, power generation, food & beverage)
✔ HVAC system differential and static pressure monitoring
✔ Pressure/level monitoring in pharmaceutical and water treatment plants
✔ Marine and aerospace environments requiring compact high-accuracy sensors
Catalogue：
Additional information
| Medium | gas, liquid |
|---|---|
| Diaphragm material | 316L, Hastelloy C, Tantalum, Other |
| Range | 6 kPa, 40 kPa, 250 kPa, 1 MPa, 3 MPa, 10 MPa |
| Accuracy | ± 0.075%F.S |
| Electrical interface | M20*1.5 waterproof lead-out, NPT1/2 waterproof lead-out |
| Temperature (Working) | -20…+70℃ [-4…+158℉] with display |
| Temperature (Storage) | -40…+85°C [-40…+185°F] |
| IP grade | IP65 |
