SKU: SENS-1312
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TE Connectivity VS803-51 Liquid Level Sensor Float Switch, SPST-NO, Polypropylene, 15W, 250VAC

₹3,769.00 (Inclusive of all taxes)
Out of Stock

The TE Connectivity VS803-51 is a vertical-mount float switch for high or low-level liquid detection in tanks and reservoirs. Featuring a SPST-NO reed switch, it is rated for 250VAC/1A and is compatible with a wide range of liquids, making it suitable for integration into industrial control panels, PLCs, and automated water management systems.

Features

  • SPST-NO reed switch rated for 250VAC, 1.0A, and 15W maximum load
  • Glass-filled polypropylene body for high chemical resistance and durability
  • Dual mounting capability for top or bottom tank entry with included hardware
  • Wide operating temperature range from -10°C to +80°C
  • Normally open or normally closed operation via simple float reversal

Out of stock

Description

The VS803-51 liquid level sensor utilizes a hermetically sealed reed switch actuated by a magnetic float. This contactless switching mechanism ensures high reliability and long service life by isolating the electrical contacts from the measured liquid. The sensor’s glass-filled polypropylene housing and silicone-sealed internal components provide robust protection against a wide range of chemicals, coolants, and wastewater.

Designed for straightforward integration, the sensor includes stripped cable connections for quick wiring and a comprehensive mounting kit for secure installation. Its compact 90mm length allows for deployment in confined spaces within tanks, sumps, and reservoirs. The unit’s construction is rated to withstand significant shock and vibration, ensuring stable operation in demanding industrial environments.

Key Features

  • High-reliability magnetic reed switch with SPST-NO (Form A) contact configuration
  • Rugged glass-filled polypropylene housing offering excellent chemical resistance
  • Versatile mounting options for top-down or bottom-up installation in tank walls
  • Wide liquid compatibility for use with water, coolants, oils, and non-aggressive wastewater
  • Robust mechanical design resistant to shock (up to 50g) and vibration (up to 35g)
  • Simple polarity-free operation; switch state (NO/NC) changes with float orientation
  • Includes complete installation kit: fixing nut, friction relief washer, sealing grommet, and wall container
  • 0.5m long PVC-insulated stripped cables for direct and easy connection

Applications

  • High or low-level alarm and control in industrial water storage and cooling towers
  • Liquid level monitoring in HVAC system condensate pans and pump sumps
  • Overflow protection and pump control in wastewater treatment and drainage systems
  • Coolant level sensing in machine tool reservoirs and automotive industrial equipment
  • Liquid presence detection in chemical processing tanks and agricultural irrigation systems

Technical Specifications

Manufacturer Part NumberVS803-51
Switch TypeSPST-NO Reed Switch (Form A)
Maximum Switching Voltage250 VAC
Maximum Switching Current1.0 A
Maximum Switching Power15 W
Contact ConfigurationNormally Open (NO), reversible to Normally Closed (NC)
Housing MaterialGlass-Filled Polypropylene
Operating Temperature Range-10°C to +80°C
Minimum Liquid Specific Gravity≥ 0.7
Sensor Length90 mm
Weight36 g
Cable0.5 m, PVC-insulated stripped wires
Shock ResistanceUp to 50g
Vibration ResistanceUp to 35g

Frequently Asked Questions

What is the electrical rating of the VS803-51 float switch?

The VS803-51 is rated for a maximum switching voltage of 250 volts AC (VAC) and a maximum current of 1.0 amp, resulting in a maximum power load of 15 watts. It utilizes a single-pole, single-throw, normally open (SPST-NO) reed switch. The electrical contacts are isolated from the liquid, making it suitable for direct switching of pumps, alarms, or indicator lights within these limits.

How do I change the switch from normally open (NO) to normally closed (NC) operation?

The switch state is determined by the orientation of the magnetic float on the stem. The sensor operates as normally open (NO) in its standard vertical mounting position. To achieve normally closed (NC) operation, you simply reverse the sensor, mounting it upside-down. No electrical rewiring or internal modifications are required, providing flexible high- or low-level detection from a single unit.

What liquids is this sensor compatible with, and what are its mounting options?

The sensor's glass-filled polypropylene body offers high chemical resistance, making it compatible with water, coolants, oils, and non-aggressive wastewater, provided the liquid has a specific gravity of 0.7 or greater. It supports both top-mounted (hanging) and bottom-mounted (upright) installation via a standard tank penetration, using the included sealing grommet, washer, and fixing nut for a secure, leak-resistant seal.

Package Includes

  • 1 x TE Connectivity VS803-51 Liquid Level Sensor Float Switch
  • 1 x Fixing Nut
  • 1 x Friction Relief Washer
  • 1 x Sealing Grommet
  • 1 x Container Wall (Mounting Bracket)

Additional Information

Weight 0.04 kg
Dimensions 11 × 8 × 3 cm