Products / Railway settlement monitoring level meter

Railway settlement monitoring level meter

Settlement is a slow process, and over any short period the change reflected in the liquid level of the storage tank is extremely small. Whether this tiny change can be detected in real time and with precision, reflecting the small settlement of the foundation and allowing problems to be forestalled, is the key to judging whether a level meter product is good or bad; this places extremely high demands on the real-time performance and precision of the liquid level sensor integrated into the system. Because the installation is outdoors, the temperature coefficient, waterproofing and lightning protection of the liquid level sensor are all key technologies. In addition, the installation dimensions and ease of replacement of the complete level meter are also important technical indicators. It is composed of a high-precision liquid level gauge together with a storage tank, a protective cover, an air communication tube, water pipes and other components.

Railway settlement monitoring level meter

Overview

The differential-pressure level meter is a precision instrument based on the communicating vessel principle. By measuring the relative change in liquid level between several interconnected storage tanks installed at the points being measured and the storage tank at the measurement base point (a fixed point), it inversely derives the settlement change of each measuring point relative to the datum point.

1. Imported precision pressure core;

2. Zero point, full scale and temperature compensation, digital integrated amplifier board;

3. Four-core waterproof electrical connector;

Applications

  • Rail transit subgrade settlement monitoring
  • Metro support wall settlement monitoring
  • Mountain body and buildings above the tunnel
  • Highway subgrade and slope settlement detection
  • Bridge pier and excavation settlement detection
  • Nuclear power plants, large hydropower stations
  • Dams and water conservancy hubs, foundations of high-rise buildings
  • Comprehensive utility tunnel settlement monitoring

Specifications

ParameterValue
Measured mediumLiquid
Pressure formDifferential pressure
Pressure range0 – 200mmH20, 0 – 1000mmH20,0 – 20mH20 (within rangeCustomisable)
Temperature range40 – 100 °C
Combined accuracy0.05 – 0.1 %FS
Resolution0.01 mm
Signal outputRS485-RTU
Supply voltage12 V DC (7 – 30VDC)
Insulation impedance≥1000 MΩ/100VDC
Compensation temperature20 – 60 °C(special temperature ranges on order; customised compensation down to −30 °C available)
Medium temperature40 – 85 °C
Ambient temperature40 – 80 °C
Storage temperature40 – 85 °C; Relative humidity:0 – 95% RH
Response time≤5mS
Overload pressure150 %FS
Burst pressure3 times range
Electrical connectionWaterproof aviation plug, direct lead-out
Protection ratingIp67, IP68
Connecting cableFour-core waterproof aviation connector
Connection materialAviation aluminium alloy, anodised
Process connectionLiquid guide tube: Ф10 mm PU tube / air guide tube: Ф8 mm PU tube / customisable

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