LTC4881 Liquid Level Transmitting Controller

time：2021-01-11 browse：second

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overview：

LTC4881 liquid level transmitting controller is an intelligent instrument integrating liquid level measurement, display, transmission and control, this product adopts advanced ARM processing chip. while achieving accurate measurement, it can provide rapid response and control of multiple relays by compensation and adjustment of sensor. The controller supports peak record and action delay, display is clear and easy to read. The design of multiple buttons makes the operation easier and more convenient, and the signal output form can be switched between voltage and current. The product provides three installation forms: baseplate, guide rail and panel, protection grade for its body is IP65, and protection grade for the probe is IP68.

LTC4881 liquid level transmitting controller provides 5 relay outputs + 1 analog output, which is widely applied in liquid level detection, action control and water level alarm of petroleum, chemical industry, urban water supply and drainage etc.

main features
parameter
structure
selection
application

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main features

● Level measurement for liquid media

● 14-segment LED display

● Button programming, simple operation

● Max. 5 relays control independently, time-delay function

● Switchable analog output form

● Record the highest liquid level during work(can be cleared by key)

● Baseplate, guide rail and panel installation forms optional

● Hardware misoperation protection

● Support MODBUS communication

parameter

Input	Power Supply	(220±44)V AC/22V~32V DC
	Range	1m，2m，5m，10m，20m，50m，100m，200mH₂O
	Overpressure	1.5 times FS
Output	Accuracy	≤±0.5%FS
	Repeatability	≤±0.2%FS
	Display	4 digit 0.56 inch 14-segment LED display
	Display Refresh	200ms
	Temperature drift	≤±0.03%FS/℃ (Zero/FS)
	Resolution	0.1cm
Analog Output	Current type	4mA~20mA DC, Load resistance ≤560Ω
Analog Output	Voltage type	0V~10V DC, Load resistance ≥10kΩ
Switch Output	Output Mode	5 relays, normally open or closed contact
	Switching voltage	≤277V AC；≤30V DC
	Switching current	≤3A
	Response time	<1ms
	Switch Point Setting	1.5%FS~99%FS
	Return Difference Setting	1%FS~10%FS
	Relay Life	≥10,000,000 times/load (min.)；≥100,000 times/load (max.)
	Switch Delay	0s~99s
Environmental Conditions	Operation Temp.	-25℃~65℃/-13℉~149℉
	Storage Temp.	-40℃~70℃/-40℉~158℉
	Media Temp.	-20℃~80℃/-50℉~176℉
	Relative Humidity	0%~85%
	Electromagnetic compatibility	GB/T 17626.2/3/4-2006
	Viberation	≤5g/10Hz...500Hz(IEC 60068-2-6-2007)
	Impact	≤10g/11ms(IEC 60068-2-27-2008)
	Protection	Controller Body IP65；Probe IP68

structure

Unit: mm

selection

LTC4881	Liquid Level Transmitting Controller
	Range	Measurement Range: 1, 2, 5, 10, 20, 50, 100, 200mH₂O
	[0m~Xm]L	X: Actual measurement range L: Cable length, L-X=(1~2)m suggested
		Code	Power Supply
		AC	220V AC
		DC	22V~32V DC
			Code	Output Signal
			KA	5-relay+analog(4mA~20mA DC )
			KV	5-relay+analog(0V~10V DC)
			KAV	5-relay+analog(4mA~20mA/0V~10V DC double use)

LTC4881	[0m~3m]5	DC	KA	the whole spec.

application

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