The UDZ series electric contact water level gauge is mainly used for measuring water levels in boiler steam drums, high and low heaters, deaerators, evaporators, DC boiler start-up separators, steam drum continuous discharge expansion vessels, water tanks, etc. This device consists of three parts: measuring cylinder, electrode, and secondary instrument. The measuring cylinder collects signals through electrodes and transmits them to the secondary instrument, which uses
Digital and dual color light columns display the liquid level inside the container.

Technical parameters of UDZ series electric contact water level gauge

Power supply voltage: 220V ± 10%, 50Hz
Working environment temperature: -10-45 ℃
Relative humidity at work: ≤ 85%
Liquid water resistance range: 0-500K Ω
Relay output contact capacity: 220V, 3A
Number of water level display points: 1-23 points (see ruler code table)
Dimensions: 80mm × 160mm × 120mm
Hole size: 152mm × 76mm
Wall mounted instrument dimensions: 200mm × 120mm × 75mm
Whole machine power: ≤ 5W



① Using a dual color digital tube light column to display liquid level, the light column is in the color of vapor red and water green.
② It has the function of measuring the resistance value of water vapor in various water qualities used to adjust the appropriate critical value.
③ It has four sets of high and low liquid level alarm sound functions, high H1, ultra-high H2, low L1, ultra-low L2.
④ It has the function of automatically detecting the quality of all light-emitting diodes on the panel.
⑤ The electrode adopts AC power supply, which overcomes the defects of electrode polarization, damage and scaling caused by DC power supply
Extended the service life of the electrode.
⑥ Anti strong interference measures have been adopted to overcome various interferences caused by multiple lines and long transmission distances.

① It has the function of displaying liquid level simultaneously with a digital tube and a dual color light-emitting diode light column, and the light column is steam red water green.
② It has the function of measuring the resistance value of water vapor in various water qualities used to set appropriate critical values.
③ Equipped with 4-20mA signal output and SR-485 standard communication interface.
④ It has power-off protection function. After a power outage, the self-contained power supply can continue to work for 3 hours.
⑤ It has six sets of high and low liquid level alarm sound functions, high H1, high H2, high H3, low L1, low L2, low L3.
⑥ It has the function of automatically detecting the quality of all light-emitting diodes and digital tubes on the panel.
⑦ Equipped with electrode detection function, when the electrode is short circuited, it will not affect the liquid level display and the alarm and interlocking action of the alarm point.
⑧ The electrode is powered by AC, effectively extending its service life. Overcoming the shortcomings of easy damage and scaling
Trapped.
⑨ Anti strong interference measures have been adopted to overcome various interferences caused by multiple lines and long transmission distances.

Technical parameters Working pressure: 1.6, 2.5, 4.0, 6.4, 10, 12, 16, 22, 32MPa Working temperature: ≤ 600 ℃ Insulation performance: ≥ 500M Ω Measurable center distance: ≤ 3000mm The electrodes (electrical contacts) are made of ultra pure ceramics. There are two types of structures: press in type and threaded type.

Electrode Model Specification Table model Specification Installation form of measuring cylinder DJM1615-115 M16×1.5×115 External thread type DJM1615-97 M16×1.5×97 DJM1615-87 M16×1.5×87 DJM1815-115 M18×1.5×115 DJM1815-87 M18×1.5×87 DJY2212-115 φ22×φ12×115 Press in type DJY2212-87 φ22×φ12×87 DJY2012-87 φ20×φ12×87 DJY1712-115 φ17×φ12×115 DJY1712-87 φ17×φ12×87

working principle
The electric contact water level gauge is designed based on the different electrical resistivity of water and steam. The electrode of the measuring cylinder has a low impedance to the cylinder in water and a high impedance to the cylinder in steam.
As the water level changes, the number of electrodes in the water also changes. Convert into a change in resistance value. Transmit to the secondary instrument to achieve functions such as water level display, alarm, protection interlock, etc.