Product Overview

The PhaseGuard ST 40 is an in-line phase switch for turbidity. It is a universally applicable device for real-time phase detection over a large measuring range. This device is engineered for process optimisation and control. It features an integrated display and operating unit with a colour screen for information directly at the measuring point. It is a reliable, durable, and cost-efficient solution, proudly designed and manufactured in Switzerland.

Key Benefits

• Real-Time Monitoring with a very short reaction time.
• Extremely Low Maintenance due to a proven, seal-less design with durable sapphire windows and LED.
• Hygienic Design compliant with EHEDG standards and Regulation (EC) No 1935/2004 for materials contacting food.
• Minimises Product Loss by quickly detecting phase transitions during product changes and CIP processes.
• Easy Integration with simple configuration directly on the device and various process bus options.

Applications

• Monitoring and control of phase transitions in beverages like beer and fruit juices.
• Optimisation of beer and yeast separation.
• Cleaning monitoring (CIP) in industries such as the dairy sector.
• Detection of phase transitions during product changeover and product push-outs.

Features & Construction

• Measuring Principle: Absorption.
• Light Source: LED 870 nm.
• Housing: Robust metal housing made of Stainless Steel 1.4301 / AISI 304.
• Sensor Head Material: Stainless Steel 1.4404 / AISI 316L.
• Window Material: Sapphire.
• Mounting: Easy installation into a VARINLINE housing or compatible in-line systems.
• Display: 2.4" display with a resolution of 320 x 240 pixels and a touchscreen.
• Permanent Monitoring: Features permanent humidity and temperature monitoring.

Technical Specifications

Specification	Value
Measuring Range	0 ... 100% Absorption
Accuracy	+/- 1% Absorption
Resolution	0.5% Absorption
Reaction Time	< 0.3 s at 0 seconds integration time
Process Pressure (Max.)	1 MPa (10 bar) at approx. 100 degrees C
Pipe Connections	DN 40 ... DN 150, 1 1/2" ... 6"
Ambient Temperature	-10 ... +50 degrees C
Protection Class	IP 66
Power Consumption (Max.)	3 W

Interfaces

• Standard Output (LT): 1 current output 0/4... 20 mA (max. 700 Ohm), 1 digital input, 2 digital outputs.
• Configurable I/O: Available with up to 6 configurable inputs/outputs.
• Fieldbus/Digital: Ethernet LAN connection via PoE (Power over Ethernet), Modbus RTU, Profibus DP-V1 Slave, and Profinet IO.
• Access: Permanent access to measured values and status information.
• Mobile Access: Access via Smartphones for extended configuration and maintenance.