Input type liquid level transmitter
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Description
I. product use
The TPS400 series static pressure (input) liquid level transmitter is widely used in petroleum, chemical industry, sewage treatment, urban water supply, machinery, metallurgy, electric power, scientific research and other enterprises and institutions to realize the measurement of liquid, gas or steam pressure, and is applicable to all weather conditions and the measurement and control of all kinds of corrosive liquids, gases and steam pressure in various occasions.
Two, working principle
The TPS series hydrostatic liquid level transmitter uses the static pressure generated by measuring the liquid level height to measure the liquid level. When the sensor part of the liquid level transmitter is put into the liquid medium, the process pressure converts the pressure signal to the electrical signal through the pressure sensor. After amplifying by the differential amplifier and the output amplifier, and then converting it to the input through the conversion of the V/A converter. The 4-20mA standard current output signal is linearly proportional to pressure.
Three, product characteristics
1, high accuracy and good stability. In addition to laser correction of imported original sensors, the comprehensive temperature drift and nonlinearity of the whole machine in the temperature range are compensated meticulously, so the temperature and stability are good in the temperature range.
2. Reliable mechanical protection IP65 and explosion protection iaIICT5 can be used in all kinds of harsh environments.
3. It can be used to measure viscous, crystalline and corrosive media.
4, 4-20mA standard current output signal, two-wire system, with load anti-interference ability.
5, small volume, light weight, installation, maintenance, easy to use.
Four, technical indicators
Measured medium | Liquid, gas, steam |
measuring range | Gauge pressure 0-2KPa-100MPa |
Absolute pressure 0-100KPa-35MPa | |
Negative pressure -100kpa-1.0MPa | |
(liquid level) 0-10m-100m | |
output | 4-20mA |
accuracy | 0.25%F.S, 0.5%F.S |
supply voltage | 12-36VDC |
stability | Better than + 0.2%FS years |
Mechanical protection | IP65 |
Service temperature | -20-+80 C |
Storage temperature | 40-125 C |
Overload limit | The rated range is 1.5-3 times. |
relative humidity | Less than 95% |
Load resistance | Not more than 75 ohms |
Installation location | No influence |
zero temperature | Less than 0.02%/ degrees C |
Full range temperature coefficient | Less than 0.02%/ degrees C |
Transmitter housing | Cast aluminum alloy |
O circle | Ding Qing rubber |
Isolation diaphragm | 316L stainless steel |
Shell spraying | epoxy resin |
Electrical connection | Hester joint and waterproof joint |
Contact medium connector | Stainless steel |
Process connection mode | Threaded M20*1.5, M12*1.5, 1/2NPT, 1/4NPT, G1/2, G3/8 (customized according to customer requirements), flange DN20, DN25, etc. |
Five, zero and range adjustment.
The zero and range of transmitter can be adjusted continuously after opening. (Z) is a zero point potentiometer, (S) is a full range potentiometer.
Six, selection table
TPS-400 | Static pressure (input) liquid level transmitter | ||||
A | Universal type, suitable for water, sewage, sea water and other weak corrosive liquid media. Liquid material: alumina ceramics, PVC, 316L, seals: fluorine rubber. | ||||
B | Oil resistant type, suitable for gasoline, clear oil, heavy oil and other organic solutions. Liquid material: alumina ceramics, 316L, seals: Ding Qing oil resistant rubber. | ||||
C | Acid and alkali resistant, suitable for hydrochloric acid, dilute sulfuric acid, concentrated sulfuric acid and other inorganic solutions. Liquid material: alumina ceramics, polytetrafluoroethylene, PPR, seals: fluorine rubber. | ||||
D | Food hygiene, conform to GMP standard and 3-A hygiene standard. Liquid material: ceramic diaphragm, 316L, seal: silicone rubber. | ||||
One | Flange mounting type | ||||
Two | Bracket mounting type | ||||
Three | Hygienic quick assembling clamp type | ||||
Four | Thread mounting type | ||||
P | Ordinary waterproof type, protection grade IP65, without on-site display. | ||||
D | Flameproof ExdIICT4-CT6 | ||||
B | Intrinsically safe ExiaIICT4-CT6 | ||||
L | With live LED digital display | ||||
□ | Length of gas guide cable or installation height |