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FEATURES
Ranges ± 2500 Pa
Accuracy is up to ±0.4Pa
The transparent observation tube is equipped with a water gauge head, which can observe the level changes in big reservoir.
The reflective mirror can show the contact between the water level head and the liquid level inside the observation tube.
Fine adjust disc with 200 equal divides is fixed on a long screw. The long screw moves big reservoir up and down. The bottom scales shows the height of big reservoir.
APPLICATION
Coal mine
Low pressure calibration in lab.
Low pressure test, vacuum test, differential pressure test (non corrosive gases)
VIDEO
YouTube video links: https://youtu.be/u4IqyNyeqys
SPECIFICATION
Pressure range: -2500Pa to 2500Pa (±10 inch Water)
Accuracy class: 0.02
Tolerance error: ±0.4Pa (-1500 Pa to +1500 Pa); ± 0.5Pa (-2500 Pa to -1500 Pa) ; ± 0.5Pa (+1500 Pa to +2500 Pa)
Liquid level scale resolution: 0.01mm
Liquid in reservoirs: Distilled water, deionized water
Stability: Maintain at 2500Pa for 3 minutes, and no pressure drop in the next 1 minute
Maximum pressure: Maintain at 5000Pa for 10 minutes, and no pressure drop in the next 5 minutes
Zero alignment tolerated error:< ±0.1Pa
Zero return tolerated error: < ±0.2Pa
Dimension: 230mm x 322mm
Weight: 6kg
SCOPE OF DELIVERY
BL569 compensated micro manometer
Flexible connection hose x 2
User manual
Transit case
OPTIONAL ACCESSORIES AND SERVICES
ISO17025 calibration certificate (P/N: CAL-569)
Low pressure calibration pump
ORDERING MODEL NUMBER
BL569-2500-02
Working principle?
The working principle of BL569 compensated micro manometer is to compensate for the decrease in water level caused by external pressure by raising the liquid level of the large container, so that the water level of the small container returns to its original zero position. That is, the compensation principle is used to balance the pressure generated by the liquid level difference between the large and small containers with the external input pressure.

How to calculate the water level "height " of big reseroir?
Please download the calculator tool.
How to check the water density in different temperature?
Please refer the follow web links:
https://www.internetchemistry.com/chemical-data/water-density-table.php
How much volume of water is needed in system?
about 65 ml