UHCZ-66 Magnetostrictive Level Transmitter

Product Overview:

　　The UHCZ-66 series magnetostrictive level transmitter is independently developed and manufactured by our company. It mainly consists of three components: a magnetic float, a sensing element (probe rod), and an electronic housing (transmitter unit). The magnetic float serves as the measuring element; as the liquid level rises or falls, the magnetic float synchronously magnetically couples with the sensing element. The electronic housing then collects the signals from the sensing element that vary with the liquid level and converts them into a 4–20 mA current signal, which is output simultaneously. To broaden its application scope, the 4–20 mA current signal can be combined with the HART communication protocol or can also utilize RS485 bus communication, enabling remote monitoring and control of the liquid level. For convenient on-site observation and display of the liquid level, the instrument head is equipped with an LCD screen.

Working principle of magnetostrictive level gauges:

　　During measurement, the circuit unit generates a current pulse that travels downward along the magnetostrictive wire (waveguide). This pulse creates a circular magnetic field. As the magnetic float rises and falls with the liquid level, it carries a set of permanent magnets inside. Consequently, the float itself also generates a magnetic field. When the current-induced magnetic field intersects with the float’s magnetic field, a “twisted” pulse—or a “return” pulse—is generated. The time difference between the “return” pulse and the original current pulse is converted into a pulse signal, which is then used to determine the actual position of the float and thereby measure the liquid level. The electronic control unit converts the liquid-level changes into a 4-20 mA current signal output, enabling remote transmission, measurement, recording, and control corresponding to the liquid-level variations.

Main performance parameters:

　　Measurement range: Rigid rod ≤ 6 m, flexible rod ≤ 20 m

　　Measurement accuracy: ≤ ±1 mm, with built-in temperature and pressure compensation.

　　Resolution: ≤ ±0.5 mm

　　Operating temperature: -40℃ to +250℃

　　Work pressure: Rigid rods up to 42.0 MPa (optional), flexible rods up to 10.0 MPa (optional)

　　Main body and accessories wetted materials: 316L/304 stainless steel, HC, TA2, PVC, etc.

　　Material of magnetic float sensors: 316L/304 stainless steel, TA2, TA18, PVC, etc. The maximum pressure rating for the magnetic float is ≤42.0 MPa, and the minimum diameter of the magnetic float is ≤25 mm.

　　Power supply voltage: 12V～32V DC, typical value 24V DC, with lightning protection, reverse connection protection, and overcurrent protection features.

　　Output signal: 4–20 mA DC / HART7 / RS485. Can output single-level, dual-level, and triple-level signals.

　　Medium density: The measurable medium density ≥ 0.45 g/cm³. Minimum density difference ≤ 0.2 g/cm³.

　　Medium temperature: -40℃ to +250℃

　　Medium viscosity: ≤1.25 St

　　Explosion-proof rating: Flameproof type Ex db IIC T6 Gb, Intrinsically safe type Ex ia IIC T6 Gb

　　Protection rating: IP67

　　Electrical interface: M20×1.5(F)/NPT 1/2″(F)

　　Installation method: Flange and matching ferrule locking structure; probe rod insertion depth is flexible and adjustable.

Main features:

　　The device features stable performance, a simple and elegant appearance, straightforward two-wire wiring, and convenient, quick disassembly and maintenance. It is designed with an EMC-compatible circuit that meets the requirements of GB/T17626.2-2018 for electrostatic discharge immunity at Level 3, GB/T17626.5-2019 for surge (impulse) immunity at Level 3, GB/T17626.4-2018 for electrical fast transient/burst immunity at Level 3, and GB/T17626.8-2006 for power-frequency magnetic field immunity at Level 4. The product has obtained the SIL2 certification and includes built-in temperature and pressure compensation functions to ensure measurement stability. Installation utilizes a flange connection combined with a matching clamp-lock structure, making installation easy and allowing flexible adjustment of probe insertion depth.

Installation diagram:

Model Coding Instructions

　　Note: For the magnetostrictive level transmitter, it is recommended to use an M20×1.5(F)/NPT 1/2″(F) electrical interface; for electric trace heating systems, a G3/4″(F) electrical interface is recommended; and for steam jacket connection pipes, a ZG1/2″(F) interface is recommended.

　　Ordering Instructions (Please provide the following technical parameters when placing your order)

　　(1) Product name and model

　　(2) Measurement range, measurement accuracy

　　(3) Flange pipe diameter, pressure rating, and flange standard for top and bottom connections

　　(4) Types of working media, density, viscosity, and temperature

　　(5) Working environment, ambient temperature

　　(6) Other requirements (e.g., installation space, trace heating and insulation, electrical interfaces, output signals, etc.)