Ultrasonic Non-invasive level switch (for closed container)

Working principle

The liquid level sensor couples high-frequency ultrasonic pulses to the container wall, the pulses penetrate container wall to propagate in the liquid, and are reflected by the inner surface of the container, detect and calculate the characteristics of the reflected signal, and transmit the measured data to the on-site secondary instrument in real time through the RS485 interface, it can be judged whether the liquid level has reached the position where the level sensor is installed.

Product features

Type	Feature
SYCW102-LC1	● Wide range of applications: can be used for toxic, highly corrosive, high pressure, various complex working conditions, and various liquid media measurement in explosive gas environments. ● When installation not need stop production, not need clear tank, no need fire; easy installation and simple operation. ● Operate the controller with the magnetic pen.
SYCW102-LC2	● Advanced signal processing method, can overcome the influence of temperature drift, stronger ability of anti-interference. ● The new installation method, adsorption type + adhesive type, can improve the stability of the probe work. ● Built-in temperature sensor, 24-hour monitoring temperature changes, temperature compensation can also be performed. ● Adopt single-probe mode, which is more convenient for installation and avoids repeated calibration. ● Operate the controller with the magnetic pen.

 

Application conditions

• Applicable medium: Pure liquid, emulsion liquid, suspension liquid, etc. Measurable medium list as follow:

C3,  Acetone, Propylene, Oxalic acid, Diesel, Nitromethylaniline, Butadiene, xylene, sulfuric acid, vinyl chloride, kerosene, unsymmetrical dimethyl hydrazine, gasoline, light hydrocarbons, light oil, caustic soda solution, liquid ammonia, Liquefied carbon dioxide, liquefied gas, liquid chlorine, Ethanol, ether, vinyl, crude oil, ethylene oxide, methylamine,Toluene, methanol, Methyl tert-butyl ether, dimethyl ether, Phenol water, Freon, Banana water, Nitric acid, Bromine, salt brine, hydrochloric acid, edible oil, Tetrachloroethylene, Anhydrous hydrogen fluoride, vegetable oil.

• Material of container: carbon steel, stainless steel, various hard metals, glass fiber reinforced plastic, epoxy resin, hard plastic, ceramics, glass, hard rubber or other composite material.

• Measurable wall thickness of tank: 2 ~ 70 mm.
• Applicable tank’s shape: Horizontal tank, spherical tank, trough tank, vertical tank, etc.

Dimension of level controller SYCW102-LC1

 

Dimension of level controller SYCW102-LC2

 

Dimension of double probe

 

Dimension of Single probe

 

Technical specification

Model	SYCW102-LC1	SYCW102-LC2
Type	●Ordinary explosion-proof type ●Explosion-proof type (Two monitoring points) ●Intrinsically Safe ●Intrinsically safe (Two monitoring points)
Accuracy	±2 mm
Measurable wall thickness of tank	≤ 70 mm
Output signal	Liquid level alarm， 4 ~ 20 mA ( for Intrinsically Safe)
Relay capacity	DC30V 6A / AC250V 6A
Power supply	DC24V
Power	1 W	2 W
Electrical connection	Configure according to the model selection
Diameter of threading hole	φ8 mm (φ6 ~ 8 mm ) Adapter cable diameter
Explosion-proof	Exd IICT6 Gb	Ex ia IICT Ga
Shell material	cast aluminium alloy
IP grade	IP67
Applicable place	Other explosive gas environment except for coal mine
Ambient temperature	-50 ~ +70℃
Ambient humidity	15% ~ 100%RH
Operation temperature of Ultrasonic level sensor	Ordinary type: -50 ~ +80℃, High type temperature type: up to 200℃
Size of converter	236 / 186 * 125 * 171.5 mm		155 * 241 * 129.4 mm
Weight of converter	2.5 Kg		2.6 Kg
Communiction distance of Handle controller	NA		3 m
Intrinsically safe parameter	Ui: 28VDC  Li:93Ma  Pi:0.65W  Ci:44Nf   Li: 11uH

 

Installation diagram for SYCW102-LC1   ( Spherical tank, Double probe, one alarm point )

Item	Part Name	Connection specification	QTY	Remark
▲	Cable entry	Configure according to Model selection	3	Contain mounting bracket and “U” type clamp
1	Local controller	Configure according to Model selection	1
2	Galvanized tube	User configure		User provide
3	Explosion-proof wiring box		1	Probe and cable assembly
4	Explosion-proof flexible tube	G 1/2	3
5	Right angle connector		2
6	Ultrasonic probe and sucking disc		2
7	Explosion-proof flexible tube	User configure	3	User provide

Installation attentions for SYCW102-LC1:

1）on the tank body, the area which the probe contacts shall be polished to smooth and no rust. When installing the suction cup, the wave-emission face of the probe must be coated with silicone grease.
2) The ultrasonic probe and cable assembly (including item 3, 4, 5, and 6) have been assembled before leaving factory. Items 2 and 7 need to be provided by the user.
3) On the vertical tank, the high-level alarm ultrasonic probe is recommended to be installed near the spiral ladder for easy installation and maintenance. The ultrasonic probe signal line is inserted into the galvanized pipe and then connected to the controller along the spiral ladder.
4）After the wiring is completed, the explosion-proof packing culvert at the instrument’s cable entry must be sealed with the configured explosion-proof cement.
5）Explosion-proof flexible pipes are respectively connected to the cable entry of the controller. After installation, the controller shall be higher than the horizontal galvanized pipes on its both sides.
6）The connection specifications of the explosion-proof flexible pipe and the galvanized pipe shall be consistent with the actual selection requirements (cable entry is reserved on the instrument), and the joints between the pipe fitting and the instrument must be done treatment of waterproof and explosion-proof.

 

Installation diagram for SYCW102-LC2 ( Horizontal tank, single probe, one alarm point )

Item	Part Name	Connection specification	QTY	Remark
1	Controller		1
▲	Cable entry		4
2	Galvanized tube	User configure		User provided
3	Digital Probe components	M20*1.5 (F)	1
4	Explosion-proof flexible tube	User configure		User provided
5	Probe cable	User configure		User provided

 

Installation attentions for SYCW102-LC2:

1) The digital ultrasonic probe provides adapter specification, adapter need to be equipped by the customer, When wiring, remove the adapter first, then re-install and tighten it after threading.
2) Items 2, 4 and 5 need to be provided by the user.
3) On the tank, the high-level alarm ultrasonic probe is recommended to be installed near the spiral ladder for easy installation and maintenance. The ultrasonic probe signal line is inserted into the galvanized pipe and then connected to the controller along the spiral ladder.
4) Explosion-proof flexible pipes are respectively connected to the cable entry of the controller. After installation, the controller shall be higher than the horizontal galvanized pipes on its both sides.
5) The connection specifications of the explosion-proof flexible pipe and the galvanized pipe shall be consistent with the actual selection requirements (cable entry is reserved on the instrument), and the joints between the pipe fitting and the instrument must be done treatment of waterproof and explosion-proof.
6) The meter body must be well grounded.

 

Wiring diagram of Level controller ( one alarm point, 4-wire system )

 

Wiring diagram of Level controller (with convertor )

 

Wiring diagram of Level controller ( 2 alarm points)

 

Wiring diagram of Level controller ( for SYCW102-LC2 )

 

Application case