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Media Type:

Level Measurement Type:

Device Classification:

Number of Switch Points:

(#)

Measuring Range:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Field Adjustable?

Maximum Operating Pressure:

Material Temperature Range:

Output Options:

Meter Technology:

Mounting Options:

Communication Interface Options:

Instrument Display Options:

Instrument User Interface Options:

Help with Level Sensors specifications:

Device Type
   Media Type:       
   Your choices are...         
   Liquid       Devices measure liquids. 
   Dry Material (Bulk Solids and Powders)       Devices measure dry materials, including powders and bulk solids. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Level Measurement Type:       
   Your choices are...         
   Continuous Level       Devices measure levels within a given range. The output provides a continuous reading of the level. 
   Point Level / Multi-Point Levels       Devices mark a specific level and are generally used as a high alarm or switch. Multiple-point sensors can also be integrated in one device to add a low alarm, or to serve as a stepped version of a continuous level. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Device Classification:       
   Your choices are...         
   Sensor-Only       Devices are sensors or transducers. Products in this category provide outputs for processors, controllers, or data acquisition systems; however, they do not have a display or user interface. Choose this option for applications that require a switch. 
   Sensor System       Devices are simple instruments or gauges. Products provide more capabilities than sensor-only (transducer) devices, and may include a display and/or user interface. Choose this option for applications that require a simple gauge, a locally-programmable (stand-alone) unit, or a controller/totalizer. 
   Level Gauge       Level gauges provide a direct, visual measurement of liquid volume. Because they provide a direct measure, there are no intermediate components that can provide a faulty reading. 
   Transmitter       Sensor transmitters are designed to transmit data from the sensor via a two-wire current loop. The loop has an external power supply, and the transmitter acts as a variable resistor with respect to its input signal. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Measuring Range
   Number of Switch Points       The level sensing device has a series of switches along the probe. When the material is present this causes the switch to activate. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Measuring Range       The level range that devices can measure. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
           
   Allowable Sensor Over-Range       Overrange specification limits the range of matching products to the specified range multiplied by a selected overrange factor. This keeps returned matches close to the range requirement and filters out products with a wider range than needed. "From", "To", and "Overrange" must all be specified to activate this option.

Example: User specifies a sensor with a range from 0-100. Without overrange specification, sensors with ranges of 0-100, 0-1000, and -10,000 to +10,000 are returned as matches. An overrange specification of 50% will filter out any sensors with a full scale range greater than 150. 

   Search Logic:      Matching products will have a range within the specified overrange limit.
   Field Adjustable?       Different ranges can be selected while devices are in the field. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Process Operating Conditions
   Maximum Operating Pressure       The maximum operating pressure for which devices are rated. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Material Temperature Range       The maximum material temperature for which devices are rated. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Output Options
   Output Options:       
   Your choices are...         
   Analog Voltage Signal       The output is an analog voltage signal. 
   Analog Current Signal (e.g., 4-20 mA)       The output is an analog current signal (transmitter) such as 4-20 mA. 
   Frequency / Modulated Frequency       The output is a frequency or modulated frequency (e.g., sine wave, pulse train, AM, FM). 
   Alarm / Visual Indicator       The output is an audible alarm or visual indicator. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Meter Technology
   Meter Technology:       
   Your choices are...         
   Air Bubbler       Air bubblers feed a gas (usually air) at constant volumetric rate through a bubble tube submerged in a liquid. The amount of pressure needed to force the bubble from the bottom of the tube is equal to the hydrostatic pressure at that point. 
   Capacitive / RF Admittance       Capacitive or RF admittance devices use a radio frequency (RF) technique that is based on differing dielectric constants. The impedance from the RF signals changes whenever the material approaches the sensing region. 
   Differential Pressure Sensors       Differential pressure sensors measure head pressure in a vessel based on the height of the media. 
   Electrical Conductivity or Resistance       Electrical conductivity or resistance-based devices use a low-voltage power source applied across separate electrodes. A conductive liquid which contacts both probes completes a conductive circuit. 
   Mechanical / Magnetic Floats       Mechanical devices or magnetic floats use sealed reed switches in a stem with a permanent magnet installed in the float. As the float rises or falls, the switch is activated. 
   Optical       Optical devices use optic sensors and the principle of optical reflection to detect the presence or absence of fluid. Typically, light emitting diodes (LEDs) are used as the light source.  
   Pressure Membrane       Pressure membrane meters have a pressure-sensitive switch. They transmit pressure to an internal sensor via an organic or thin-metal membrane. 
   Radar / Microwave       Radar or microwave devices send a microwave pulse toward the process material. The pulse is reflected back by the material's surface and detected by the receiver. The level is inferred from the time of flight. 
   Radio Frequency       Radio frequency (RF) devices emit a high-frequency/low-power radio signal from a probe. When the material contacts the probe, the bridge becomes unbalanced and a comparing circuit realizes the change. This causes a relay output to change state. 
   Rotation Paddle       Rotation paddles are small electric motors that drive a paddle which rotates freely in the absence of material. When the paddle is impeded by material, the motor senses this and typically triggers a switch. 
   Ultrasonic / Sonic       Ultrasonic or sonic devices measure the length of time it takes for a reflected sound wave to return to a transducer. Transmitted time is proportional to level. 
   Vibrating / Tuning Fork Method       Tuning forks use various technologies (typically piezoelectric) to vibrate a probe and then constantly monitor the presence or absence of that vibration. 
   Other       Other unlisted, specialized, or proprietary meter technologies. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Mounting Options
   Mounting Options:       
   Your choices are...         
   Side Mount       The device mounts on the side of the vessel which contains the media to measure. 
   Top Mount       The device mounts on top of the vessel which contains the media to measure. 
   Bottom Mount       The device mounts at the bottom of the vessel which contains the media to measure.  
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Communication Interface Options
   Communication Interface Options:       
   Your choices are...         
   Serial Interface       Serial interfaces use a serial communication protocol such as universal serial bus (USB), RS232, or RS485. 
   Parallel Interface       Parallel interfaces use a parallel communication protocol such as general-purpose interface bus (GPIB). 
   Other       Devices use other, unlisted communication interfaces (e.g., modems, RF transmitters). 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Instrument Options
   Instrument Display Options:       
   Your choices are...         
   Non-Electrical Visual or Audio Output       The display has a non-electrical visual indicator such as simple float, or an audible click. 
   Analog Meter or Indicator       The display has an analog meter (typically with a needle), or uses LED indicators. 
   Digital Readouts       The device displays numerical or application-specific readouts. 
   Video Display Terminal (VDT)       Video display terminals (VDT) include cathode ray tubes (CRT) and flat panel displays (FPD). 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Instrument User Interface Options:       
   Your choices are...         
   Analog Front Panel       The interface has analog inputs such as potentiometers, dials, or switches. 
   Digital Front Panel       The device is set up or programmed through a digital front panel. 
   Computer Controllable       The device can be controlled remotely via a computer interface. 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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