Wiring diagram of electronic level instrument for fire pool

WH311 electronic liquid level sensor Installation instructions for
1. Because pot Sludge, oil residue and other matters are easy to deposit at the bottom or bilge, so it is recommended to leave the measuring probe from the tank (bilge) bottom at a certain height to avoid sundries blocking the probe.
2. When the medium fluctuates greatly, air conduction Cable In case of a long time, the probe shall be fixed with a sleeve to prevent the swing of the probe from affecting the measurement accuracy.
3、 Transmitter When installing on the side, the bending radius of the gas conducting cable should be greater than 10 cm to avoid damaging the gas conducting cable due to excessive bending.
4. Input type Liquid level transmitter The grounding terminal shall be reliably grounded, Power Supply The shield wire shall be connected with it.
5. When measuring explosive dangerous goods, they must be installed in strict accordance with GB3836.1-83 General Requirements for Explosion proof Electrical Equipment for Explosive Atmospheres and GB3836.4-83 Intrinsically Safe Circuits and Electrical Equipment "i".

According to Technical Code for Fire Water Supply and Hydrant System GB50974 standard ，
Urban Fire Remote Monitoring System G26875-2011 standard ，
Fixed Fire Water Supply and Hydrant Equipment Part 3:
Fire pressure boosting and stabilizing water supply equipment GB27898.3-2011 standard:
Water level of fire high-level water tank and fire pool
must Display the real-time status of water level in the fire room.
Timely detect the change of water level, detect the very high water level, and start the emergency signal of ultra-low water level,
Turn the emergency signal signal of very high and ultra-low water level startup into switch signal,
The module is connected to the fire start emergency signal controller,
And then transmitted to the urban fire network control center, WH311 fire water tank water level monitor,
The water level of WH311 elevated water tank and fire pool is composed of WH311 input water level sensor, water level indicator, etc,
The real-time water level of the high-level water tank and the fire pool is displayed in the fire control room, and the very high and ultra-low emergency signal water level starts the emergency signal in time, so as to facilitate the management of the fire supervision personnel.


Wiring diagram of electronic level instrument for fire pool

Water level gauge of fire pool, 5m high
Features of input liquid level transmitter
Good stability and high precision
Directly put it into the measured medium, WH311 electronic liquid level sensor It is very convenient to install and use.
Solid structure, no movable parts, high reliability, long service life, high-precision measurement can be carried out from water, oil to paste with high viscosity, and is not affected by the foaming, deposition and electrical characteristics of the measured medium
Wide range temperature compensation.
Liquid level control system and wiring diagram for fire protection
It has power supply reverse phase comparison protection and overload current limiting protection.

Wiring diagram of electronic level instrument for fire pool
WH311 Liquid level control system and wiring diagram for fire protection The pressure probe of the cable type liquid level transmitter is made of stainless steel (1Cr18Ni9Ti), and the cable sheath is rubber plastic. The PTFE probe, stainless steel or PTFE cable sheath can be selected for special requirements.
The pressure probe and cable sheath of the straight rod liquid level transmitter are made of all stainless steel (1Cr18Ni9Ti), and the insertion height of the transmitter can be freely adjusted within ± 20cm.
Main technical indexes of input liquid level transmitter

Measurement range: 0.3~100m (user selected)
Accuracy: 0.2, 0.5, 1.0
Operating temperature: - 20~80 ℃
Output signal: two-wire system 4 ～ 20mADC
Power supply voltage: standard 24VDC (12-36VDC)
Insensitive zone: ≤± 1.0% FS
Load capacity: 0-600 Ω
Relative temperature: ≤ 85%
Protection grade: IP68
Explosion proof sign: Exia Ⅱ CT4-6
Water level gauge of fire pool Wiring diagram of electronic level instrument for fire pool



WH311 electronic liquid level sensor How to install
1. When the liquid level transmitter is installed in a static deep well or pool, the steel pipe with an inner diameter of about Φ 45mm (several small holes are drilled at different heights so that water can enter the pipe smoothly) is usually fixed in the water, and then the input liquid level transmitter can be put into the steel pipe for use.
2. When measuring the liquid level of flowing or agitated liquid, the steel pipe with an inner diameter of about Φ 45mm (several small holes are drilled at different heights on the opposite side of the liquid flow direction,
So that water can enter the pipe smoothly), and then put the input level transmitter into the steel pipe for use.
3. The installation direction of the transmitter shall be vertical, and the input installation position shall be far away from the liquid inlet and outlet and the agitator.
4. In case of large vibration, steel wire can be wound on the transmitter to absorb vibration, so as to avoid breaking the cable
Water level gauge of fire pool, 5m high
WH311 electronic liquid level sensor Precautions
1. If any abnormality is found during use, turn off the power supply, stop using, check or contact the technical department
2. Connect the power supply in strict accordance with the wiring instructions of Wanhe Instrument.
3. During transportation and storage, the liquid level transmitter shall be restored to its original packaging and stored in a cool, dry and ventilated warehouse.
electric

Liquid level control system and wiring diagram for fire protection high
WH311 Liquid level control system and wiring diagram for fire protection Water level gauge of fire pool, 5m high Only one pressure probe is put into the liquid, and the circuit part is in the junction box at the other end, which is convenient for users to adjust. The installation methods are M42 x 1.5 thread installation and DN50PN0.6MPa (GB9119-88) standard flange installation.
WH311 electronic liquid level sensor The pressure probe of the split liquid level transmitter is made of stainless steel, and the probe is connected to the junction box by a special hollow cable. The resistance to Acid alkali cable.

WH311 electronic liquid level sensor ， The pool is 3m high. Wanhe selects the imported sensing component with anti-corrosion membrane, and puts the core into a stainless steel or PTFE housing. The top steel cap can not only protect the sensor membrane, but also enable the liquid to contact the membrane smoothly; The product has accurate measurement, good stability, and good sealing and anti-corrosion performance. There are three installation modes for users to choose: input type, flange type and armored type. Liquid level control system and wiring diagram for fire protection

　　 WH311 electronic liquid level sensor It is widely used in chemical industry, tap water, petroleum, liquor making, electric power, gold and other fields.
Technical indicators
Range: 0-0.2~100mH2o
Output selection: 4-20mA 0-5V
0-l0mA 1-5V
Operating temperature: - 20 ～ 85 ℃
Overload: 3 times
Measuring medium: stainless steel (1Cr18Ni9Ti) or PVC compatible medium
Accuracy: 0.1, 0.25, 0.5
Power supply: 24VDC
Protection grade: IP68
Stability: 0.2% FS/year



WH311 electronic liquid level sensor The pressure probe and sheath of armored liquid level transmitter are made of all stainless steel (1Cr18Ni9Ti). The insertion of the transmitter into the upper layer can be freely adjusted within ± 20cm. When the range is less than 2m, the rod type or cable type is used. When the range is more than 2m, the armored type is used for transportation and installation.
Water level gauge of fire pool, 5m high
WH311 electronic liquid level sensor Guangzhou pressure transmitter customized 4-20mA pressure transmitter manufacturer sales
High temperature resistant pressure transmitter is assembled with high-temperature resistant "sputtered film" pressure chip, and the sensor can

Long term stable work. The temperature of the measured medium can be further improved by assembling heat sinks with different lengths, which is reasonable and scientific

Configuration, advanced circuit design and temperature compensation processing fully ensure the long-term stability of the transmitter in the high 300 ℃ environment

Work. Reverse comparison and current limiting protection; Laser resistance adjustment temperature compensation, zero point and range can be adjusted on site; Wide range resistance

Corrosion, suitable for various media; Strong overload and anti-interference capability, stable performance.
Water level gauge of fire pool, 5m high Wiring diagram of electronic level instrument for fire pool

WH311 electronic liquid level sensor Widely used in water plants, oil refineries, sewage treatment plants, building materials, light industry, machinery and other industrial fields to achieve liquid

Measurement of body, gas and steam pressure.

Water level gauge of fire pool, 5m high

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