LQT248H HART Module
Product Overview
The LQT248H is a high-precision, high-stability HART transmitter module launched by Shanghai Luoqian, integrating most HART protocol commands and some custom commands. It is suitable for signal transmission of up to ten types of thermocouples and RTDs. This product uses an independent ADI 24-bit Σ-Δ analog sampling chip to ensure high measurement accuracy; comprehensive surge and reverse polarity protection design prevents misinstallation and misoperation in engineering applications; enhanced software security design includes independent watchdog, low-voltage monitoring reset, and multitasking scheduling optimization. All components are industrial-grade, ensuring long service life and stability. To facilitate long-term stocking for large customers, configuration can be performed using buttons and HART communication devices.
Key Features
- Supports multiple types of temperature sensor inputs
- High-precision measurement with accuracy up to 0.1%
- Excellent temperature stability
- 4-20mA standard current output
- Wide operating voltage range
Technical Specifications
| Parameter | Specification | Parameter | Specification | |
|---|---|---|---|---|
| Operating Power | 12~35VDC | Output | HART+4~20mA | |
| Measurement Accuracy | RTD 0.1%; TC 0.2% | Output Current Limit | 20.8mA | |
| Excitation Current | 210uA | Sensor | Various RTD, Thermocouple | |
| Load | 250Ω or 500Ω | Transport and Storage Temperature | -40~120℃ | |
| Temperature Coefficient | ≤25ppm/℃ F.S | Housing Material | PA66 | |
| Operating Temperature | -30~80℃ | Mounting Screws | M3*2 |
