The VSmart Module

VSmart communicates to your SiteSentinel® iSite™ console through a unique wired, wireless or network connection. VSmart uses multi-drop technology to lower installation costs by allowing installers to use fewer wires between the VSmart, probes and sensors.

All digital devices can be multi-dropped directly to a VSmart I.S. Barrier, making installation quick and easy. Using patented proprietary IntelliSense™ technology for probes and sensors, the VSmart automatically detects the type of device connected to it and sends the information directly from the VSmart Module to the SiteSentinel® iSite™ console for easier programming. With a NEMA 4-rated enclosure, the VSmart Module can be located near the tank area (note: not in Zone 0, 1 or 2), which will reduce or eliminate direct wiring runs back to the SiteSentinel® iSite™ console.

Features & Benefits
  • Wireless - Optional single wireless radio antenna installed above ground for higher-power signal and assurance of best possible connection
  • Automated - Automatic probe, sensor density float and LLD on any I.S. channel
  • Installation - Interfaces probes, sensors and LLDs to the SiteSentinel® iSite™ console by multi-dropping through a single I.S. channel
  • Savings - Lowers installation costs by eliminating multiple wiring (home runs) for probes, sensors or LLDs back to the console in the building
Technical Information

The VSmart Module Specifications

  • NEMA 4-rated VSmart enclosure
  • Optional wireless modem
  • Maximum of eight (8) VSmart Modules per SiteSentinel® iSite™ console
  • Number of Probes: Up to 32 Model 924B probes and/or eight (8) flex probes per VSmart Module
  • Probe Length: 924B rigid stainless steel; horizontal tanks up to 12 feet (3.7 m); vertical tanks up to 20 feet (6.1 m) or flexible PVDF for AST applications up to 70 feet (21.3 m)
  • Maximum of 12 Model 327 VLLD Sensors per I.S. Barrier
  • Maximum of 16 probes per I.S. Barrier
  • Maximum of 128 sensors per VSmart module
  • Maximum of 64 IntelliSense™ Sensors per I.S. Barrier
  • Location: Class 1, Division 1, Group D; EEx ia IIA T 4
  • Typical Mounting Location: Outdoor, non-hazardous area
  • Operating Temperature: -40°F to 158°F (-40°C to 70°C)
  • Data Cable: Belden 88760 (18 AWG) maximum of 1,000 feet (305 m) per barrier position; Belden 8871 (22 AWG) maximum of 500 feet (152 m) per barrier position
  • Dimensions: [W x H x D]: 11.3 x 5.6 x 5.8 inches (29 x 14 x 15 cm)
  • Maximum twisted-pair wiring using RS-485: 5,000 feet (1,524 m)
  • Maximum wiring for Ethernet (CAT5/CAT6): 300 feet (91.4 m)
  • Wireless capability extend up to 1,500 feet (457 m) maximum with free line-of-site

VSmart Certifications

Intrinsically Safe Module Certifications

Leak Test Certification

EPA Static Leak and Continuous Test Certified (ATGS & CITLDS methods):

  • 0.2 gph (0.76 L/hr) Statistical Leak Test Note: 397,000 gallons (1,502,809 liters)/month throughput for single-tank, 2-tank or 3-tank manifold installations; 30,000-gallon (113,562-liter) combined maximum capacity
  • 0.2 gph (0.76 L/hr) Static Leak Test
  • 0.1 gph (0.38 L/hr) Static Leak Test
  • 3.0 gph (11.4 L/hr) Catastrophic Line Leak Test
  • 0.2 gph (0.76 L/hr) Precision Line Leak Test
  • 0.1 gph (0.38 L/hr) Precision Line Leak Testt


VSmart can handle two (2) four-channel I.S. Barriers.

VSmart Digital (12-volt) I.S. Module Capabilities

Ordering Information

Please CONTACT LIQUIP for all ordering information.


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