one, Overview

XYB-2088B series of liquid level transmitter uses the principle of hydrostatics, when the density of the measured medium stability, the measured liquid height is proportional to the static pressure generated by the measured medium can be used to measure the open container and the city Water supply, chemical tank, the level of the oil depot level, the transmitter structure of solid, easy to install and so on Transmitter Zero, range can be adjusted on-site , Overload and anti-interference ability, stable performance.

hard Rod level transmitter ---- pressure sensor and the junction box cable between the use of stainless steel tube package protection, it has a strong hardness, can be directly inserted into the bottom of the measured liquid for the range of 4mH2O within the Open the container or level measurement to be inserted into the installation.

Armoured Type liquid level transmitter ---- pressure sensor and the junction box cable between the use of stainless steel flexible hose package protection, it has a certain strength, but also has a certain flexibility, suitable for portable installation, such Level transmitter measurement range of 0 ~ 20mH2O , High temperature and corrosive media can be measured.

cable Type level transmitter ---- pressure sensor and the junction box cable between the use Waterproof cables, Softness it is good , Suitable for portable installation, such liquid level transmitter measurement range of 0 ~ 200MH2O , Not Measurement of high temperature and corrosive media.

Bottom mounted level transmitter ---- transmitter mounted directly at the bottom of the container under test, removable and washable, quick installation and flange mounting flange optional, The measuring range of this level transmitter is 0 ~ 100MH2O,

Explosion-proof products can be used in a variety of harsh and dangerous places.

Second, the working principle
Using the principle of static pressure measurement
When the liquid level transmitter into the measured liquid in a certain depth, the sensor is subject to the liquid surface pressure: P = p.

Calculation Wherein

P: pressure on the sensor facing the liquid surface, unit: Pa
P: measured liquid density, unit: kg / m3
G: local acceleration of gravity, in m / s2
P ·: atmospheric pressure on the surface, in Pa
H: the depth of the sensor into the liquid, in m
At the same time, through the air guide cable on the surface of the atmospheric pressure P · introduced into the sensor back pressure chamber to offset the sensor welcoming surface Of the P, so that the sensor measured pressure: P = p.g.H
Obviously, by measuring the pressure P, you can get the liquid level H. Sensor sensed pressure signal amplified by the circuit, compensation , Voltage and current conversion After the standard signal output.

three , Features
Good stability, high precision, high performance / price ratio
Directly into the measured medium, the installation is quite convenient
Solid structure, no moving parts, high reliability, long service life
From the water, oil to the viscosity of the larger paste can be a high-precision measurement, not subject to the media bubble,

Deposition, electrical characteristics of the impact
No material fatigue wear, vibration, shock insensitive
Wide range of temperature compensation
With power reverse polarity protection and overload , Current limiting protection

four , The main technical parameters

Measuring medium: non-crystalline.

Measuring range: 0 ~ 0.5m ~ 200m optional

Output signal: 4 ~ 20mA, 0 ~ 10mA, HART protocol

Operating voltage: 12 ~ 36VDC, recommended 24VDC

Display: LED, LCD,% optional

Installation: rod, cable, Kay mounted, at the end of type

Medium temperature: -20 ~ +70 ℃ (cable type, rod type) -20 ~ + 150 ℃ (armored type)

Operating temperature: -20 ~ +70 ℃

Temperature effects: Lt; / RTI & gt;0/02% Fs ° C

Explosion-proof: Explosion-proof type EXd IIBT4

Shell protection: better than IP65