Description
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Product Overview
The Rosemount 3308 wireless guided wave radar transmitter is a battery-powered WirelessHART level instrument designed for tanks and remote vessels. It eliminates signal and power wiring, measuring liquid level and oil-water interface, and transmitting data wirelessly to the control system.
Perfect for tank farm retrofits and remote sites without power supply, it cuts costs on cables, cable trays and installation work. With Direct Switch Technology, it performs reliably even with foam, vapor and heavy product buildup.
Key Features
✅ WirelessHART communication, battery operated
No field wiring required. Up to 9 years battery life, saving cable and installation cost.
✅ Direct Switch Technology
Detects liquid level and oil-water interface, immune to foam, vapor and medium buildup.
✅ Advanced on-board diagnostics
Continuously monitors probe, electronics and wireless signal, enables predictive maintenance.
✅ Wide probe portfolio
Rigid rod, flexible cable, coaxial, PTFE coated probes for corrosive, high temp & pressure service.
✅ Hazardous area & SIL certification
Intrinsically safe approvals, SIL2 certified for overfill protection applications.
✅ IP66/IP67, NEMA 4X enclosure
Suitable for outdoor tank farms, humid and dusty environments.
Specifications
• Measurement principle: TDR Time Domain Reflectometry
• Max measuring range: 17 m
• Accuracy: ±3 mm, repeatability ±2 mm
• Measured medium: liquid, oil-water interface
• Process temperature: -40 ℃ ~ +150 ℃
• Process pressure: Full vacuum to 40 bar
• Communication: WirelessHART
• Power: Internal lithium battery
• Housing material: Aluminum / Stainless steel optional
• Probe material: 316L, Hastelloy, PTFE coating
• Protection: Intrinsically safe
• Enclosure rating: IP66/IP67, NEMA 4X
Applications
• Oil & gas storage tanks, oil-water interface monitoring
• Chemical storage tanks, corrosive liquid measurement
• Sump pits, wastewater tanks
• Tank farm retrofit projects without new cabling
• Remote sites with no available external power
Selection Tips
1. Coaxial probe is recommended for oil-water interface measurement for better signal performance.
2. Rod probe for viscous or sticky media; cable probe for long range measurement.
3. PTFE coated or Hastelloy probe for corrosive fluids.
FAQ
Q: Does 3308 require external 24V power?
A: No. It runs on internal lithium battery with WirelessHART, no field power wiring needed.
Q: Can it measure both level and oil-water interface?
A: Yes. Direct Switch Technology provides both liquid level and interface readings.
Q: Does it work with foamy liquid?
A: Yes. Guided wave radar is less affected by foam than non-contact radar. DST helps detect true liquid surface.
Q: What is the wireless transmission distance?
A: WirelessHART mesh network. Line-of-sight range up to several hundred meters, mesh extends coverage across tank farms.
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