QX Series Level Switch
Features
• No Moving Parts
• 316L Stainless Steel Sensor/Nickel Braze
• Temperatures to +350F
• Pressures to 2000 PSIG
• Simple and Easy Field Calibration
• Explosion Proof Enclosures
• Low Flow Rate Detection
• Threaded, Flanged, Retractable Probes
• Fast Response for Time Critical Applications
• Field Programmable for Relay Energization
Applications
• Pump Protection: Automatic shut down on low or no flow
• Bearing Lubrication: Detects loss of lubricant flow
• Seal Leakage: Verifies positive seal flow or detects excessive leakage indicating maintenance requirement
• Chemical Feed and Metering Pumps: Indicates low or no flow of chemical additives to process
• Safety Shower/Eye Wash Station: Automatic annunciation of potential danger to plant personnel
• Analyzer/ Gas Chromatographs: Confirms continuous sample flow to instruments
• Control Rooms: Verifies flow when fans, pumps or valves are energized
• Purge Air: Detects loss of flow for process or plant safety
• Spray Nozzles: Detects nozzle blockage in coating applications
• Relief Valve/Rupture Disks: Alarms on flow or leakage of safety relief valves or rupture disks
• Chiller Lines: Automatic shut down of chillers on low or no flow
• Heater Burnout Prevention: Heater shutdown on loss of flow to prevent overheating of elements
• Tank Car Loading: Senses dry line or phase change from liquid to nitrogen gas flow
• Drain Line Sensor: Capable of detecting flow in partially filled lines
• Agitation Monitor: Positive indication of agitation in tanks
Operation
The QX series flow switch offers the same reliability as our FX series and also offers a faster response time. The thermal dispersion principle of operation features no moving parts and provides an extremely reliable and repeatable switch for the most demanding industrial applications.
The sensor head employs two temperature sensors with a constant very low power heating source physically attached to one of the temperature sensors. The second temperature sensor is isolated from the heating source and provides compensation for changing process temperatures (see figure 1). As flow changes so does the temperature differential. This allows the device to be used as a flow/no flow sensor and to be used to switch at any velocity shown in the flow switch range chart.
Extremely low flow rates can be detected with rangeability up to 300:1. These devices are ideal for use in virtually all liquids, gases, and slurries. With no moving parts exposed to the process end users are provided an extremely reliable and repeatable instrument even in viscous or corrosive applications.
The electronics are available with single or dual switch points. Temperature monitoring is also available with either a switch output or a linear 4-20 mA output.
Relay outputs are standard and are offered with several different configurations and contact ratings. Remote mounting of the electronics is also available.
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Ameritrol
Inc.
1185L Park Center Dr. • Vista, CA 92081
1-800-910-6689
Voice 760-727-7273 Fax 760-727-7151
E-mail: sales@ameritrol.com |
