ZTD displacer level (interface) transmitter is an intelligent level measuring instrument with international leading level independently developed by DDTOP after many years of technical research. The simple buoyancy principle is used to detect the change of level, and then the magnetic signal is converted into a stable 4-20mA current signal and output through the torque tube assembly and the hall sensor. The instrument has a variety of configurations and pressure levels, which are suitable for various applications.
Made in China. brand DDTOP, model ZTD
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DDTOP has been developing and producing displacer liquid (interface) displacer level transmitters since 1992. After years of technical research and experience accumulation, the product performance has reached the international leading level. ZTD type displacer liquid level (interface) transmitter can be used to measure liquid level, interface or density, output 4 ~ 20mA current signal with HART communication protocol. Through a compatible HART communicator, the level controller can be queried, configured, calibrated or tested, and the information of a single measurement loop can also be accepted, and the information on site can be transmitted to the control system.
Working Principle
ZTD series intelligent displacer liquid (interface) level transmitter is composed of controller, chamber, displacer, torque tube and other components. The change of the liquid level causes the buoyancy of the displacer to change, and the change is transmitted to the torque tube assembly, so that the torque tube and the mandrel rotate an angle synchronously. A sensing system coupled to the torque tube mandrel generates a voltage signal. The electronic component of the liquid level controller measures the liquid (interface) level signal and provides a 4-20mA current output. The microcontroller measures the ambient temperature to compensate for changes in liquid density due to process temperature changes. LCD can display information such as analog output, process variable, process temperature (RTD needs to be installed), torque tube rotation angle and
percentage range of liquid (interface) level.
1.SIL2 certification certified by both French Bureau Veritas and Shanghai SITIIAS.
2.Verification is not needed, only configuration is needed.
3.The product provides 4-20 mA with HART, and can be configured, calibrated and diagnosed on site using the 475 Communicator
4.Comprehensive fault diagnosis, warning and status history
5.EU PED pressure vessel certification, the applicable pressure can be up to 42MPa
6.Maximum process temperature which is applicable in non-vapor condition can be up to 500℃
7.Flame-proof and Intrinsic safety certified by CSA, ATEX and IEC
8.Process parameters can be adjusted online
9.The transmitter can be converted arbitrarily in 8 positions without affecting the on-site use
10.It is suitable for interface measurement and density measurement
11.EU EMC directive CE certification
Applications
Power supply: 12~30 VDC; with reverse polarity protection. (When using HART communication, the controller voltage should be greater than or equal to 17.75VDC).
Output: 4～20mA DC+HART (Positive effect is to increase output due to increase in level, interface or density; or negative effect is to decrease output due to increase in level, interface or density)
Range: 300 mm – 2500 mm (customised; custom design if out of range)
Pressure rating: ≤42.0MPa (class2500)
Nominal diameter: DN40 or customised
Ambient temperature: -40 ℃ to +80 ℃ (When ≤ -20 ℃, LCD display is not displayed, remote transmission can be used normally).
Ambient temperature: -196℃≤T≤+450℃
Accuracy: 0.5
Power supply influence: When the power supply voltage varies between min and max, the output signal variation is within ＜±0.2% of the output range.
LCD display: Current output signal, process variable, process temperature, percentage range, torque tube angle.
Density: 0.2≤ρ≤1.9 g/cm3
Difference in average density: ≥0.04 g/cm³
Torque tube material: Standard configuration Inconel 600, or Monel, HasetlloyC-276
Chamber material: CS, 304, 316 or as required by the customer.
Dispenser material: 304, 316 or as required by the customer.
Flange standard: HG/T20592-2009, HG/T20615Translated with DeepL.com (free version)
| Model | Code | Contents | ||||||||||
| ZTD- | Level sensor | |||||||||||
| 1 | Level measurement | |||||||||||
| 2 | Interface measurement | |||||||||||
| 3 | Density detection | |||||||||||
| A | Mounting from top side | |||||||||||
| B | Mounting from top to bottom | |||||||||||
| C | Side attachment | |||||||||||
| D | Bottom side attachment | |||||||||||
| E | Top fixing | |||||||||||
| 2 | PN10(1.0MPa) | |||||||||||
| 3 | PN16(1.6MPa) | |||||||||||
| 4 | PN20(Class150) | |||||||||||
| 5 | PN25(2.5MPa) | |||||||||||
| 6 | PN40(4.0MPa) | |||||||||||
| 7 | PN50(Class300) | |||||||||||
| 8 | PN63(6.3MPa) | |||||||||||
| 9 | PN100(10.0MPa) | |||||||||||
| 10 | PN110(Class600) | |||||||||||
| 11 | PN150(Class900) | |||||||||||
| 12 | PN160(16.0MPa) | |||||||||||
| 13 | PN250(25.0MPa) | |||||||||||
| 14 | PN260(Class1500) | |||||||||||
| 15 | PN420(42.0MPa) | |||||||||||
| 16 | PN420(Class2500) | |||||||||||
| / | ||||||||||||
| d | Explosion-proof | |||||||||||
| i | Intrinsically safe | |||||||||||
| 1 | 20 | |||||||||||
| 2 | 304 | |||||||||||
| 3 | 316 | |||||||||||
| 4 | 316L | |||||||||||
| X | According to user requirements | |||||||||||
| D | Temperature class：-30℃≤T＜+100℃ | |||||||||||
| G | Temperature class：-196℃≤T≤+450℃ | |||||||||||
| / | ||||||||||||
| Range | Filled according to the actual situation, bydefault unit is mm | |||||||||||
| — | ||||||||||||
| F | Heated chamber, flange connectionDN15, PN2.5 RF | |||||||||||
| Z | Heated chamber, threaded connection | |||||||||||
| Y | Transmitter installed on the right (default) | |||||||||||
| W | Transmitter mounted on the left | |||||||||||
| — | ||||||||||||
| 1 | DLT9010(Hart) | |||||||||||
| 2 | DLC3010/3100(Hart) | |||||||||||
| 3 | DLC3020f(FF) | |||||||||||
| 4 | 244LD(Hart) | |||||||||||
| 5 | DLC3100(Hart SIL2) | |||||||||||
| ZTD- | / | / | — | — | ||||||||
You can request the necessary certificates, documentation, instructions and user manuals for DDTOP ZTD using the special form.
You can buy DDTOP ZTD in UK or Europe at a favourable price in «DOLCHETRADE» by leaving a request on the website, by phone +441225535040 or by email dolce@dolcetrade.com. DDTOP ZTD price are subject to change depending on exchange rates. We deliver instruments by transport companies in the United Kingdom and Europe.
