PhaseGuard ST 40
PhaseGuard ST 40
In-line Interface Monitor for Turbidity
Description
The PhaseGuard ST 40 is an in-line turbidity sensor designed for reliable phase detection and interface monitoring in hygienic process lines. It enables real-time monitoring and control of product transitions in beverage, food and dairy applications, such as beer/yeast separation, beer–water interfaces, fruit juice processing and product–water changeovers. By accurately detecting interfaces and start/stop conditions, it supports process optimization, minimizes product losses and increases yields.
Using proven turbidity-based phase detection, the PhaseGuard ST 40 provides very short response times and continuous device self-monitoring in the background, ensuring stable process control and efficient CIP monitoring. Its seal-less, hygienic design according to EHEDG guidelines and compliance with Regulation (EC) No 1935/2004 on food-contact materials make it ideal for sanitary production environments.
The device features a coloured display with simple, direct configuration on the instrument and easy integration into existing control systems. With extremely low maintenance requirements, high reliability and cost-efficient operation, the PhaseGuard ST 40 is a Swiss Engineered / Swiss Made solution suitable for the beverage, food and dairy industry, as well as for chemical and pharmaceutical applications.
Technical specifications
| Measuring principal | Absorption |
| Wavelength | 870 nm |
| Measuring range | 0..100% |
| Resolution | 0.5 % Absorption |
| Accuracy | +/-1% >Absorption * |
| Response time | < 0.3 s at 0 Seconds Integration time (Step response limit value switch) |
| Path length | 10 mm (Modell PhaseGuard ST 40 S2XX - 0000) 5 mm (Modell PhaseGuard ST 40 H2XX - 8000) |
| Medium temperature | -10 ... +100 °C -10 … +85°C at ambient temperature 55°C -10 … +75°C at ambient temperature 60°C |
| Cleaning | CIP/SIP- compatible up to 120 °C @2h |
| Surroundings | -10 … +50 °C 0 ... 100 % relative humidity |
| Medium pressure | Max. 1 MPa (10 bar) @100 °C |
| Pipe connections | Inline VARINLINE® - housing or compatible DN 40 … DN 150, 1 1/2“... 6“ |
| Operating voltage | 24 VDC ± 10 % (Interface PoE according to standard) |
| Power consumption | Max. 3 W |
| Dimensions | Ø 100.5 x 137 mm |
| Material | Housing: Stainless steel 1.4301 / AISI 304 Sensor head material: Stainless steel 1.4404 / AISI 316L Window material: Sapphire Touchscreen: Soda-Lime tempering glas |
| Protection class | IP 66 |
| Warm-up time | < 3 min |
| Interfaces | |
| Profibus | Profibus DP-V1 Slave |
| Profinet | Profinet IO, classe di conformità B |
| IO | 6 configurable inputs/outputs: - Max. 2 digital inputs: 5 … 28 VDC - Max. 4 digital outputs: High-Side Switch max. 20 mA - Max. 4 current outputs: 0/4 … 20 mA, max. 700 Ohm - Modbus RTU |
| LT (Standard) | 1 Current output 0/4 … 20 mA, max. 700 Ohm, 1 digital input, 2 digital outputs |
| PoE | Ethernet LAN connection with Power over Ethernet: - Ethernet according to 10/100BaseT - POE according to 802.3af, Class 0 - Sigrist Web interface |
