Pressure Transmitters / Controllers

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LU-S545 Electronic Digital Intelligent Constant Pressure Controller

The LU-S545 electronic digital intelligent constant pressure controller uses an imported isolated diffused silicon assembly for pressure measurement and display, achieving PID constant-pressure control output through 4-20mA standard industrial signals with two push-pull switch outputs. Its all-metal housing and 330-degree rotatable display head with high-brightness LED ensure optimal readability in any mounting position.

CategoryPressure Transmitters / Controllers
Model-
Views7791 views
Updated2026-03-16

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I. Overview

The LU-S545 electronic digital smart constant-pressure controller uses imported isolated diffused-silicon components for pressure measurement and display, and realizes PID constant-pressure control output through the standard 4~20mA industrial signal. It supports two push-pull switch outputs. Its all-metal housing features a display head that rotates 330°; together with a high-brightness LED, it ensures the best reading experience in any installation orientation.

II. Technical parameters

Parameter category	Specifications
Power supply	Supply range: DC12~30V
Switch outputs K1, K2	Output type: push-pull; maximum output current: 400mA
Control / transmitter output	Output type: 4~20mA; output load: RL≤(power supply–10)/0.02
Communication	RS485 communication as standard; protocol: standard MODBUS-RTU
Accuracy	≤0.05% FS (maximum range)
Temperature drift	0.02%FS/°C
Response time	Reaches 90% of final value within 1s
Operating temperature	Medium temperature: -20~+85°C; ambient temperature: -20~+80°C
Electromagnetic compatibility	Complies with GB/T18268 requirements for industrial equipment applications (IEC 61326-1)
Degree of protection	IP65