LMI RTL Series Peristaltic Metering Pumps

LMI RTL Series peristaltic metering pumps (RTL2/RTL3/RTL4), 33.1–136 L/h, up to 6.9 bar (100 psi); IP66/NEMA 4X, ±0.5% repeatability, Modbus RTU and optical leak detection as standard. Ratings per the September 2026 official datasheet.

Max flow

33.1–136 L/h (8.75–36.0 GPH, 2026 9 is)

Max pressure

6.9 bar / 100 psi（RTL2、RTL3）；4.1 bar / 60 psi（RTL4）

Turndown / accuracy

±0.5% / ±1.0%

Wetted materials

XLCRPT

Protection

IP66 / NEMA 4X

Power

100–240 VAC 50/60 Hz；0.8 A @120 V，0.4 A @240 V

Inquire Now Download datasheetxiongxiaoyang55@gmail.com

Model flow and pressure ratings follow the September 2026 official datasheet (Lit# IR-59552 EN 09/2026).

Features

Sealed, serviceable pump head – replace only the tube, not the whole head
Optical leak detection as standard
FluxDrive motor
4.3" color display
Modbus RTU (RS485) standard; optional Profibus, Modbus TCP, Ethernet IP
IP66/NEMA 4X, ±0.5% repeatability, ±1.0% accuracy

Specifications

Flow range	33.1–136 L/h (8.75–36.0 GPH, 2026 9 is)
Max pressure	6.9 bar / 100 psi（RTL2、RTL3）；4.1 bar / 60 psi（RTL4）
Repeatability / accuracy	±0.5% / ±1.0%
Max suction lift	9.1 m（30 ft）
Enclosure	IP66 / NEMA 4X
Power	100–240 VAC 50/60 Hz；0.8 A @120 V，0.4 A @240 V
Fluid temperature	-10 ~ +45 °C
Ambient temperature	-10 ~ +50 °C
Connections	1/2" NPT / BSP, PVDF
Tube materials	XLCRPT
Communication	standard Modbus RTU (RS485); optional Profibus, Modbus TCP, Ethernet IP; USB-C
I/O	4 channels point input, 2 channels relay output, 2 channels electrode channels output, 2 channels 4-20mA input / output, 0-10VDC input, PWM input
Brand	m Milton Roy / LMI

Applications

Water treatment chemical dosing

Metering duties needing quick tube-only maintenance

Automated dosing systems on Modbus and other fieldbuses

Materials & media

Tube materials

XLCRPT

Common chemicals: NaOCl, acids, alkalis, polymers — confirm compatibility when inquiring.

Controls & communication

Connections	1/2" NPT / BSP, PVDF
Communication	standard Modbus RTU (RS485); optional Profibus, Modbus TCP, Ethernet IP; USB-C
I/O	4 channels point input, 2 channels relay output, 2 channels electrode channels output, 2 channels 4-20mA input / output, 0-10VDC input, PWM input

Models & specs

Model	Flow	Pressure
RTL2（RTL2X1 Advanced）	33.1 L/h（8.75 GPH）	6.9 bar（100 psi）
RTL3（RTL3X1 Advanced）	66.2 L/h（17.5 GPH）	6.9 bar（100 psi）
RTL4（RTL4X1 Advanced）	136 L/h（36.0 GPH）	4.1 bar（60 psi）