Smart Pressure Gate 901

The Smart Pressure Gate 901 is a sophisticated pressure control unit with digital monitoring that replaces several conventional components in refrigeration systems. Through integrated Modbus-RTU communication, precise measurement, and intelligent EC fan control, the system sustainably increases efficiency, reduces maintenance, and improves operational safety.

Your benefits at a glance

• Fewer components – less effort: Replaces mechanical manometer, pressure transmitter, speed controller, and pressure switch.

• High accuracy: Precise pressure monitoring in high and low pressure ranges with 0.5% FSS.

• Broad refrigerant compatibility: Usable with R134a, R404a, R407c, R22, R407f, R410a, R448, R449, R507 and others.

• Integrated EC fan speed control: Optimizes energy efficiency and reduces operating costs.

• Easy retrofitting: Compatible with existing connections – ideal for modernizing existing systems.

• Digital monitoring: Modbus RTU (RS485) for data transfer, logging, and remote analysis.

Technical Data

Measuring ranges

• Low pressure (LP): –1 … +19 bar (–14 … +275 psi)

• High pressure (HP): 0 … 50 bar (0 … 725 psi)

Electronic connections

• Modbus RS485 for digital communication

• 0…10 V signal for high and low pressure control

• Alternatively: Pressure transducer with 4…20 mA signal

• Up to two switching outputs for AC fans

Replaces the following components

• High/low pressure manometer

• High/low pressure transducer (0…10 V)

• Pressure transducer with 4…20 mA signal

• Dual and single pressure switches

• EC fan speed control

Ideal for modern refrigeration technology

The Smart Pressure Gate 901 is the optimal solution for operators of stationary refrigeration systems who want to make their systems more energy-efficient, safer, and more sustainable. Intelligent pressure control and fan regulation allow for reduced energy costs and easier compliance with legal requirements.