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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.)

Output Options:

Field Adjustable Measurement Ranges?

Maximum Operating Pressure:

Material Temperature Range:

Material Density:

(Specific Gravity #)

Meter Technology:

Communication Interface Options:

Mounting Options:

Instrument Display Options:

Instrument User Interface Options:

Sanitary Applications rated (3A, etc.)?

Can handle liquids with suspended solids (slurries)?

Built in alarm indicator?

Programmable?

Recorder / Totalizer Functions?

Controller Functions?

Help with Dry Material (Powders) Level Sensors specifications:

Device Classification
   Device Classification       
   Your choices are...         
   Sensor-Only       By definition, a sensor is a transducer, its output is meant for processor, controller or data acquisition system. No display or user interface is present. If you desire a switch, choose this option. 
   Sensor System       By definition, a 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. 
   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 (Sensor System) Only Options
   Instrument Display Options:       
   Your choices are...         
   Nonelectrical 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       Has analog user inputs such as potentiometers, dials, switches, etc. 
   Digital Front Panel       Setup or program through the front panel using digital keypad & displays, menus, etc. 
   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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Features
   Sanitary Applications rated (3A, etc.)?       Devices are rated for sanitary applications such as those found in the pharmaceutical and food processing industries. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Can handle liquids with suspended solids (slurries)?       Device can handle slurries, such as sewage water/ waste water. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Built in alarm indicator?       Devices have a built-in audible or visual alarm that is more than a switch or relay closure. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Programmable?       Device can be programmed for different ranges, materials, outputs, etc. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Recorder / Totalizer Functions?       Records and/or totalizes or integrates measured values (data logger). 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Controller Functions?       Has/takes sensor input, provides control function (Limits, PID, logic, etc.) and outputs a control signal. 
   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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Level Measurement Type
   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       Device marks a specific level, generally used as high alarm or switch. Multiple point sensors can be integrated together to give a stepped version of 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.
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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.
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Output Options
   Output Options       
   Your choices are...         
   Analog Voltage       The output is an analog voltage signal. 
   Analog Current       Output signal is a current, representing level. 
   Frequency or Modulated Frequency       Frequency or modulated frequency output (e.g., sine wave, pulse train, AM, or FM) 
   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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Field Adjustable Performance
   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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Process Operating Conditions
   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.
   Material Density:       Material Density listed is the maximum material density. 
   Search Logic:      All matching products will have a value less than or equal to the specified value.
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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       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. 
   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 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. 
   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, which rotates freely in the absence of material. When the paddle is impeded by material, the motor senses this and typically triggers a switche(s). 
   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 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 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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Communication Interface Options
   Communication Interface Options       
   Your choices are...         
   Serial Interface       Serial communication protocol such as RS232, RS485, USB. 
   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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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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