[Overview]

The UHZ-58/S-LB series liquid level display controller consists of a sensing transmission device and a display instrument. Widely used in industries such as refining, power, chemical, papermaking, food, and sewage treatment, it can display the liquid level of various open and closed containers and underground storage tanks on site, and can also output a two-wire 4-20mADC standard signal, which is transmitted to computers, regulators, and liquid level display devices to achieve the purpose of control, regulation, display, and alarm.
The media being detected and controlled are liquids such as water, oil, acid, alkali, and industrial wastewater. The anti-corrosion type has corrosion resistance to strong corrosive media. Explosion proof type is used in explosive environments.

[Working principle]
The stainless steel tube of the sensor inserted into the device is equipped with a set of precision dry spring chip sets. When the floating ball (cylinder) containing the magnet changes up and down with the liquid level, the corresponding position of the dry spring chip set is connected, and the resistance value changes accordingly. The voltage and current conversion circuit converts the change in resistance value into a change in current. The current signal of this change is directly indicated on site by a wide-angle meter installed at the top of the sensor, and on the other hand, it is output by a two-wire 4-20mADC standard signal and transmitted remotely to the display instrument in the control room. The display instrument performs digital display, liquid level control, and high/low alarm. The display instrument is equipped with upper and lower limit liquid level control, high and low level alarm knobs, which can be set arbitrarily within the full range.

[Main Technical Parameters]
Measurement range: 500-8000mm
◇ Medium specific gravity: ≥ 0.45g/cm3
◇ Working pressure: 0.1-2.5MPa (PVC is only used for atmospheric pressure)
◇ Working temperature: -49~+150C (PVC-200C~600C)
◇ Connecting flange: DN150 HG20592 standard
On site indication range: 0-100% wide angle gauge indication
◇ Transmitter power supply: 24V DC
◇ Transmitter output: 4-20mADC standard current signal
◇ Transmitter power consumption: ≤ 720mW
◇ Terminal box enclosure protection: IP65
◇ Long distance transmission: up to 10Km, with a maximum capacitance and inductance of 0.2mF and 5mH for cable laying
Explosion proof: Explosion proof type d Ⅱ BT4, intrinsic safety type ib BT4 (must be equipped with external safety barriers)