FlowSwitch FS 780E

The measurement system of the FS 780 is based on the triboelectric effect. Particles collide permanently with each other and are charged in a natural way.

If these elec- trically charged particles are flying next to the sensor rod of the FS 780 or touch it, the particles are detected via a charge transfer. Resting particles, such as deposits etc., do not affect the measurement. An installation into an existing exhaust duct is possible without any problems.

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Measures: Dust, Flow, Level, Moisture, Solids

Industries: Animal Feed, Manufacturing, Pharma, Wood

Brochure

Measure. Monitor. Repeat.

For better insights, better decision-making and better process performance.

Key Features & Benefits

Prevents uncontrolled dust emissions and unnecessary cleaning due to damaged dust filters
Ensures recircled air is always clean
Ensures that strict emission limits are fulfilled
Saves the company from investing into additional police/ emergency filters
Very reactive and fast detection of filter damage- Is not affected by dust buildup on the rod
Wear- and maintenance free- Easy to install into existing air ducts
Adjustable sensitivity and damping
Very flexible, can be used for nearly all applications, with multiple options

FlowSwitch FS 780

Typical Applications

Heavily contaminated air systems
Bag and cartridge filter monitoring
Clean air side filter surveillance
Air recirculation systems in factories
Processes with strict external emission limits
Dust recovery and dust reuse applications
Industrial filtration systems
Continuous and non-continuous dust monitoring processes

Product Description
Technical Data

Function

The measurement system of the FS 780 is based on the triboelectric effect. Particles collide permanently with each other and are charged in a natural way. If these elec- trically charged particles are flying next to the sensor rod of the FS 780 or touch it, the particles are detected via a charge transfer. Resting particles, such as deposits etc., do not affect the measurement. An installation into an existing exhaust duct is possible without any problems. The sensor is available either with a relay or with ana- log output (4-20 mA).

More info

The sensor rod can be individually selected between 45 and 800 mm length. A wide tem- perature range can be addressed with optional versions for 130°C, 200°C or 290°C process temperature, and ATEX zone 2 and 22 are possible. The sensor material is prepared for use in the food industry. Alternative sen- sor isolations made out of PA or PTFE and seals out of NBR, FPM or silicone are available. In addition, several settings at the sensor can be adjusted, e.g. for sensitivity and damping. To install a FS 780 a threaded socket is welded onto the pipe and a small hole for the sensor rod drilled.

The sen- sor is fixed on the socket. The rod length should be at least 1/3 of the pipe diameter and the rod must not touch the opposite side. The sensor can also be connected with a Tri-clamp adapter. Calibration is done manually and allows to adapt the sensor to any process.

Parameter	Specification
Housing material	Stainless Steel (1.4305)
Sensor rod material	Stainless Steel (1.4571)
Rod length	45 – 800 mm, customized
Mechanical connection	G 0.5” (standard) G 1.5” (high temperature versions) Tri-clamp adapter (optional)
Ambient temperature	-20°C to +70°C
Process temperature	-20°C to +90°C 130°C, 200°C, 290°C (optional)
Process pressure	0 – 6 bar
Protection class	IP67
Ex protection / ATEX	Optional Zone 2 or Zone 22
Power supply	17 – 31 VDC
Current consumption	Max. 60 mA (relay version) Max. 90 mA (analog version)
Output	Relay or 4–20 mA
Switching voltage	48 VAC or 48 VDC (relay version)
Switching current	Max. 1 A (relay version)
Output load	< 500 Ω (analog version)
Adjustment parameters	Sensitivity, damping
Calibration	Manual
Indicators	LEDs inside the housing