Product Overview
The instrument adopts a rod-type or cable-type structure and uses a dry ceramic capacitive or diffused silicon hydrostatic level sensor as the sensing element. It is equipped with a high-precision measurement, conversion, display, and control circuit, providing two independent switch outputs and a (4–20) mA current signal output. The high-brightness OLED display shows real-time level values (with multiple selectable units). It features an interactive interface with three operation buttons for simple and intuitive operation. Parameters can be set via the front panel, and all settings are automatically saved.
The instrument integrates measurement, local display, control output, and transmitter output into a compact unit. It offers a wide measuring range, multiple process connection types, and material options. It is widely used for level monitoring and control in underground and surface coal mining equipment, significantly improving automation performance.
The instrument adopts a stainless-steel explosion-proof enclosure and an intrinsically safe circuit, designed and manufactured in strict accordance with GB/T 3836 standards. The explosion-proof marking is Ex db ib I Mb. This product can also be used independently as a flameproof device.
Key Technical Specifications
Item | Technical Parameters |
Power Supply | 24 VDC (standard); operating range:（18～27）VDC |
Signal Output | (4～20)mADC (intrinsically safe output) |
Accuracy | Transmitter output: Class 1; Display: Class 1; Control: Class 1 |
Control Output | Encapsulated explosion-proof relay. Switching capacity: • AC circuit: ≤250 VA, ≤3 A, ≤250 V ; • DC circuit: ≤150 W, ≤2 A, ≤125 V |
Display | OLED display |
Power Consumption | ＜3W |
Temperature Compensation | （-20～70）℃ |
Protection Rating | IP54 (standard type), IP65 (special type), compliant with GB/T 4208 |
Vibration Resistance | ＜20m/s² |
Explosion-proof Marking | Ex db ib I Mb |
Explosion-proof Structural Features | The enclosure is made of stainless steel with a flameproof design. The viewing window is made of tempered glass. Protection rating is IP54. The cable entry device complies with GB/T 3836.1 Ex cable entry requirements. A mining cable with an outer diameter of (8–12) mm must be used. |
Installation Position | Can be installed in any orientation. |
Pressure Connection Thread | G1 1/2” or M48 × 2 male thread (standard threaded installation); other thread types must be specified when ordering. |
Weight | 3.6kg |
Model and Specifications
Model | Measuring / Control Range | Maximum Working Pressure | Transmitter Output | Control Output | Remarks |
GUD10K(A) | （0～10）m | 0.4MPa | （4～20）mA | Two independent switch outputs (switch set point, switching direction, and switching differential can all be independently adjusted). | The control switches are passive contacts. |
• The 10 m range is the standard upper limit. Other ranges can be customized according to user requirements. The minimum measuring range is (0–0.5) m and the maximum is 100 m. • The instrument determines the liquid level by measuring the hydrostatic pressure at the measuring point. The hydrostatic pressure at a point in a liquid is proportional to the distance between that point and the liquid surface, i.e.: P = ρgh. For a given medium and installation location, ρ and g are constants; therefore, the level (distance from the measuring point to the liquid surface) is determined only by the hydrostatic pressure (pressure). • Note: The default measuring medium is water with a specific gravity of 1. For other media, compensation should be made according to specific gravity. |
