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Device Classification:

Level Measurement Type:

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.)

Maximum Operating Pressure:

Material Temperature Range:

Liquid Specific Gravity:

(Specific Gravity #)

Field Adjustable Measurement Ranges?

Output:

Meter Technology:

Communication Interface:

Mounting:

Display:

User Interface:

Features:

Help with Liquid Level Sensors specifications:

Device Classification
   Device Classification       
   Your choices are...         
   Sensor-Only       This includes sensors, transducers, and switches, whose output is meant for a processor, controller or data acquisition system. A display or user interface is typically not present. 
   Instrument / Sensor System       An instrument or sensor system has more capability than a transducer. The unit may have a display and/or a user interface. If you desire a simple gauge, a locally programmable unit (stand-alone) or a controller / totalizer, choose this option. 
   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. 
   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       Device measures level within a specified range, output gives a continuous reading of 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.
   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.
   Maximum Operating Pressure       Maximum pressure environment device is rated for. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Material Temperature Range       Maximum material temperature device is rated for. 
   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.
   Liquid Specific Gravity       Maximum specific gravity of liquid being monitored. 
   Search Logic:      All matching products will have a value less than or equal to the specified value.
   Field Adjustable Measurement Ranges?       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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Output
           
   Your choices are...         
   Analog Voltage       The output is an analog voltage signal. 
   Analog Current       Output signal is a current value indicating level; include transmitter outputs such as 4-20mA, 0-50 mA, etc. 
   Frequency / Modulated Frequency       Frequency or modulated frequency output (e.g., sine wave, pulse train, AM, FM, etc.) 
   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...         
   Differential Pressure Sensors       Differential pressure sensors measure head pressure in a vessel based on the height of the media. 
   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. 
   Radar / Microwave       Device emits a microwave pulse toward process material; the pulse is reflected back by surface of material and picked up by receiver. Level is inferred from the time of flight. 
   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. 
   Electrical Conductivity / 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. 
   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. 
   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. 
   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. 
   Rotation Paddle       Device uses a small electric motor drives a paddle that rotates freely in the absence of material. When the paddle is impeded by material, the motor senses this and typically triggers a switch or switches. 
   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. 
   Vibrating / Tuning Fork       Tuning forks use various technologies (typically piezoelectric) to vibrate a probe and then constantly monitor the presence or absence of that vibration. 
   Other       Unlisted, specialized, or proprietary technology. 
   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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More Specs
   Communication Interface       
   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 Interface Type       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.
   Mounting       
   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.
   Display:       
   Your choices are...         
   Visual or Audio Output       The display has a non-electrical visual indicator such as simple float, or an audible click. 
   Analog Meter / 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:      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.
   User Interface:       
   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:      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.
   Features       
   Your choices are...         
   Rated for Sanitary Applications       Devices are rated for sanitary applications such as those found in the pharmaceutical and food processing industries. 
   Handles Slurries / Suspended Solids       Devices can handle slurries or suspended solids such as sewage and wastewater. 
   Built-in Alarm / Indicator       Devices have a built-in audible or visual alarm that is more than a switch or relay closure. 
   Programmable       Devices can be programmed for different ranges, materials, outputs, etc. 
   Recorder / Totalizer Functions       Devices are data loggers which record/totalize and integrate measured values.   
   Controller Functions       Devices have or take sensor inputs, provide control functions (e.g., limits, PID, logic), and output a control 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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