LifeGuard™ Air Bubble Detectors

The LifeGuard air bubble detector line from ZEVEX integrates application flexibility with proven reliable performance. LifeGuard air bubble sensors feature proprietary swept frequency technology making these sensors more reliable and accurate than those utilizing fixed frequency or pulse-type drive.

	ZEVEX now offers 5 working LifeGuard prototype sensors in 5 business days. Learn more now.

LifeGuard air bubble detectors offer the most flexibility in air bubble detector sizes, with three standard configurations for common tubing sizes and a factory adjustable Universal Air Bubble Detector for use with any tubing diameter ranging from .100" to .450". While the Universal Air Bubble Detector may be ideal for prototyping purposes, ZEVEX can develop a custom LifeGuard air bubble detector to fit your tubing and application.

All LifeGuard electronics are integrated into the detector housing, ready to interface with the user's system.

	Download the complete LifeGuard Specification Sheet for additional information.

LifeGuard Air Bubble Detector Specifications
LifeGuard 100 Order No: 28678-001	Channel size: .100" Nominal tubing size*: .125" Air detection threshold: > 10 microliter
LifeGuard 130 Order No: 28679-001	Channel size: .130" Nominal tubing size*: .155" Air detection threshold: > 20 microliter
LifeGuard 200 Order No: 28680-001	Channel size: .200" Nominal tubing size*: .250" Air detection threshold: > 40 microliter
Factory Adjustable Detector	Channel size: .080" - 400" Nominal tubing size*: .100" - .450" Air detection threshold: Variable, depending on configuration
Custom-Built Detector	Specifications are custom designed to meet customer's specific project requirements.
* Optimal channel spacing is determined by tubing outer diamter, tubing wall thickness, and tubing stiffness.

Features of all LifeGuard Air Bubble Detectors

• Detectors maintain precise sensitivity without calibration
• Extremely reliable swept-frequency technology prevents sensor from drifting with temperature, age, or environmental conditions
• Integrated test function provides 100% single fault coverage
• Dry-couples to PVC, silicone, and many other tubing types with thick, thin, or reinforced walls
• Sensor sensitivity can be changed with minor PCB modification
• Output pulse width is proportional to bubble size, allowing user’s system to accumulate sub-critical bubbles
• Test input for in-system verification of proper operation, test latency: 1 ms (typical)
• Power: 5 volt, <50 mA

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