working principle:
LWGY series flowmeter When the fluid to be measured flows through the sensor, the impeller in the sensor rotates by the kinetic energy of the fluid, and the impeller periodically changes the magnetoresistance value in the magnetoelectric induction system, so that the magnetic flux passing through the coil is periodically A change occurs to generate an electrical pulse signal, which is amplified by an amplifier and displayed or transmitted to a corresponding flow meter, PLC, or host computer for flow or total measurement.
Features:
1. High precision, generally up to ±1%R, ±0.5%R, high precision type up to ±0.2%R.
2. Repeatability, short-term repeatability of up to 0.05% to 0.2%, such as frequent calibration can get very high accuracy.
3. It is the preferred flow meter in trade settlement.
4. Output pulse frequency signal, suitable for total metering and connection with computer without zero drift, strong anti-interference ability.
5. The range is wide, the medium and large caliber can reach 1:20, and the small diameter is 1:10.
6. Compact and lightweight, easy to install and maintain, and large in circulation capacity.
7. It is suitable for high-pressure measurement. It is not necessary to open holes on the meter body, and it is easy to make high-pressure type instrument.
8. There are many types of special-purpose sensors, which can be designed into various types of special-purpose sensors according to the special needs of users, such as low-temperature type, two-way type, downhole type, sand mixing type, etc. It can also be made into insert type, suitable for large diameter measurement. The pressure loss is small, the price is low, and it can be continuously taken out, and the installation and maintenance are convenient.
Technical Parameters:
1. Nominal diameter:
1.1 Pipe type: DN4 ~ DN200 1.2. Plug-in type: DN100 ~ DN2000
2. Accuracy level:
2.1 Pipe type: ±0.5, ±1.0 2.2. Insert: ±1.5, ±2.5
3. Ambient temperature: -20 ° C ~ 50 ° C
4. Medium temperature:
4.1 Measuring liquid: -20 ° C ~ 120 ° C 4.2. Measuring gas: -20 ° C ~ 80 ° C
5. Atmospheric pressure: 86KPa ~ 106KPa
6. Nominal pressure: 1.6 Mpa, 2.5Mpa, 6.4Mpa, 25Mpa
7. Explosion-proof grade: ExdIIBT4
8. Connection method: threaded connection, flange clamping, flange connection, plug-in type, etc.
9. Straight pipe requirements:
9.1 Gas: The upstream straight pipe section should be ≥10DN, and the downstream straight pipe section should be ≥5DN
9.2 Liquid: upstream straight pipe section should be ≥20DN, downstream straight pipe section should be ≥5DN
9.3 Insertion type: the upstream straight pipe section should be ≥20DS, and the downstream straight pipe section should be ≥7DS (DS is the measured inner diameter of the pipe)
10. Display mode:
10.1. Remote transmission display: Pulse output, current output (with display instrument)
10.2. On-site display: 8-bit LCD displays cumulative flow, unit (m3) 4-digit LCD displays instantaneous flow, unit (m3/h), battery level, frequency, flow rate
10.3 Temperature Pressure Compensation Type:
A. Display standard instantaneous flow and standard cumulative flow
B, display current pressure, temperature, battery voltage
11. Output function:
11.1. Pulse output, p-p value is determined by the power supply
11.2.4~20mA two-wire current output
11.3. Pulse output per unit volume and raw pulse output of the sensor
11.4. With RS485 communication interface
12. Power supply:
12.1.DC5~24V
12.2. Standard 3V lithium battery installed in the instrument for more than eight years of continuous use
12.3 Temperature-compensated 3V lithium battery installed in the instrument for continuous use for more than four years, transmission distance: sensor to display distance up to 500m