Standard RF Admittance Level Switch

Made in India 100% Tested & Calibrated

Model: RFLS-300S

The RFLS-300S is Levtron's flagship standard RF admittance level switch, featuring industry-leading 3-terminal active coat-guard technology. It is built to operate reliably in severe coating, sticky slurries, viscous chemicals, and high-temperature fly ash silos without false trips.

3-Terminal Coat-Guard Severe Buildup Immunity Universal 15-260V AC/DC High Temp & Pressure

Request Fast Quote Catalog Manual

Applications & Suitability

Liquid Level Measurement: Precise detection in tanks storing water, chemicals, oils, slurries, and acids.

Bulk Solid Monitoring: Reliable level measurement for fly ash, cement, clinker, coal dust, and grains in silos.

Overfill Prevention: Prevents overflow in storage tanks by accurately detecting high liquid and solid levels.

Dry Run Protection: Protects industrial pumps and screw conveyors from running dry.

Power & Steel Plants: Proven performance in electrostatic precipitator (ESP) hoppers and coal bunkers.

Wastewater & Effluent: Immune to grease, foam, and sludge buildup in treatment tanks.

The RFLS-300S is a reliable, maintenance-free level measurement solution for industrial process automation.

Model	RFLS-300S
Instrument Type	Standard RF Admittance Level Switch
Power Supply	Universal 15 to 80 V DC & 15 to 260 V AC, 50/60 Hz
Power Consumption	< 3 VA
Output	2 DPDT Relay Contacts (5A @ 230V AC / 24V DC)
Fail-Safe Mode	Field Selectable High (FSH) / Low (FSL)
Time Delay	Adjustable 0.5 to 20 seconds
Process Temperature	-20°C to +150°C (High temp ceramic version up to +450°C)
Ambient Temperature	-20°C to +70°C
Process Pressure	Up to 25 Bar
Probe Material	SS316 / SS316L / Hastelloy C with PTFE / Ceramic insulation
Probe Length	Standard 300 mm to 3000 mm (Custom lengths available)
Process Connection	1" / 1.5" / 2" BSP/NPT Threaded or ANSI Flanged
Enclosure	Cast Aluminium Weatherproof IP66 / Flameproof Exd IIC T6
Cable Entry	2 x M20 x 1.5 or 1/2" NPT
Status Indication	Dual-colour LED (Green = Normal, Red = Alarm)

Standard RF Admittance Level Switch

Applications & Suitability

Features & Benefits

Working Principle of Standard RF Admittance Level Switch

Technical Specifications - RFLS-300S