Overview
STRWLD-228 wireless pressure transmitter is an intelligent product integrating pressure and level monitoring, data acquisition, NB-IoT, 4G, LoRa wireless communication, and battery self powered operation. It adopts a low power wireless communication mode, transmitting the collected signals wirelessly to a cloud platform or designated IP server for storage and display. The product requires no wiring, making installation quick, safe, and convenient. It is suitable for pressure monitoring in the production and storage processes of oil and water wells, monitoring of water supply networks, telemetry in water conservancy and hydropower projects, pressure detection in gas pipelines, and level detection in rivers, lakes, and seas.
Features
- Utilizes MEMS diffused silicon pressure sensors
- Wide range coverage from 0-7kPa to 100MPa
- 2G, 3G, 4G, and NB-IoT network communication, using UDP/TCP-IP protocol for transmission
- Intelligent LCD display with backlight
- Supports both remote and local zero/span adjustment
- 38Ah Lithium-thionyl chloride battery for ultra-long service life
- Explosion-proof housing with an intrinsically safe circuit system
- High-gain antenna and full-band antenna system
- Automatic power consumption control and active data alarm function
- Supports mobile app data queries and OPC configuration software for data reading
Applications and Industries
- Process control fields in industries such as petroleum, chemical, metallurgy, electric power, food, papermaking, medicine, machinery manufacturing, scientific experiments, and aerospace/military
Technical Specifications
| Parameter | Specification |
| Range | -100kPa…0~7kPa…100MPa |
| Pressure Type | Gauge pressure, Absolute pressure |
| Communication Mode | NB-IoT; 4G; LoRaWAN |
| Power Supply | 3.6V@38Ah Lithium battery; 3.6V@8Ah Lithium battery/24V power supply |
| Power Consumption | Average sending current ≤ 100mA; Sleep current ≤ 25uA |
| Accuracy | ±0.5%FS; ±0.2%FS |
| Zero Temperature Drift | ±0.25%FS/70°C |
| Full Scale Temperature Effect | ±0.25%FS/70°C |
| Ambient Temperature | -40°C~70°C |
| Medium Temperature | -40°C~110°C |
| Storage Temperature | 0°C~45°C |
| Insulation Resistance | ≥100MΩ/500VDC (200MΩ/250VDC) |
| Protection Grade | IP65/IP66 |
| Explosion proof Grade | Exd II CT6 Gb, Ex tDA21 T80°C |
| Pressure Overload | ≤200% |
| Sampling Interval | 1~65535 seconds (configurable) |
| Reporting Cycle | 1 minute~12 hours (configurable) |
| Decimal Places | 0~3 digits (configurable) |
| Long-term Stability | ±0.2%FS/year |
| Pressure Head Material | 304 Stainless steel (316L stainless steel customizable) |
| Diaphragm Material | 316L Stainless steel (Hastelloy C customizable) |
| Housing Material | Die-cast aluminum with epoxy resin coating |
| Electrical Interface | M20X1.5 |
| Installation Interface | M20X1.5 |
| Weight | 2kg (excluding options) |
