Electrical valve positioner


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【Changshu valve positioner】 why the liquid level transmitter is widely used

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【Changshu valve positioner】 why the liquid level transmitter is widely used

Release date:2017-08-25 Author: Click:

【Changshu valve positioner】 why the liquid level transmitter is widely used

Liquid level transmitter is based on the measured liquid static pressure and the liquid height is proportional to the principle of liquid level transmitter using silicon or ceramic sensitive components of the piezoresistive effect, the static pressure into electrical signals. After temperature compensation and linear correction, converted to 4-20mADC standard current signal output.

The sensor part of the level transmitter can be directly into the liquid, the transmitter part can be fixed with a flange or bracket, the installation is very convenient.

Level Transmitter 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 high-precision measurement, from the measured media bubble, deposition, electrical characteristics of the impact;

No material fatigue wear, vibration, shock is not sensitive;

Wide range of temperature compensation;

With power supply reverse polarity protection and overload current limiting protection.

Liquid level transmitter Technical performance:

Applicable medium: put into the application and 316 stainless steel, nitrile rubber, PVC coexistence of the medium, the flange can be measured without strong corrosive media.

Measuring range: 0-100m

Accuracy: 0.25%; 0.1%; 0.5%

Working temperature: -20 ℃ - +80 ℃ (medium without crystallization)

Storage temperature: -40 ℃ - + 125 ℃

Zero temperature coefficient: ± 0.015% of range / ° C

Range Temperature Coefficient: ± 0.015% of range / ° C

Long-term stability: ± 0.1% of range / year

Power supply voltage: 12-36VDC standard 24VDC

Output signal: two-wire system 4-20mADC

Load characteristics: see Figure 1, the standard 24VDC, the load resistance ≤ 600Ω

Allow overload: 3 times the standard range

Current limiting protection: In the case of overload, the power limit is rated 26mA

Protection class: IP68

Explosion protection grade: ia Ⅱ CT5

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