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Media Type:

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.)

Switch Type:

Configuration (Normal State):

Pole and Throw Specifications:

Maximum Current:

Maximum AC Voltage:

Maximum DC Voltage:

TTL Compatible?

Field Adjustable Measurement Ranges?

Maximum Operating Pressure:

Material Temperature Range:

Mounting Options:

Meter Technology:

Communication Interface Options:

Rated for Sanitary Applications?

Handles Slurries / Suspended Solids?

Built-in Alarm / Indicator?

Programmable?

Recorder / Totalizer Functions?

Controller Functions?

Help with Level Switches specifications:

Media Type
   Media Type       
   Your choices are...         
   Liquid       Material to be measured is a liquid, such as water, oil etc. 
   Dry Material (Bulk Solids and Powders)       Material to be measured is a dry material such as grains, powders 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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Features
   Rated for Sanitary Applications       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.
   Handles Slurries / Suspended Solids       Devices can handle slurries or suspended solids such as sewage and wastewater. 
   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       Devices 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       Devices are data loggers which record/totalize and integrate measured values.   
   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       Devices have or take sensor inputs, provide control functions (e.g., limits, PID, logic), and output 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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Measuring Range
   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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Switch Specifications
   Switch Type:       
   Your choices are...         
   Electromechanical Switch       Electromechanical switches have mechanical contacts or relays. 
   Solid-State Switch        Solid-state switches are electronic devices with no moving parts. 
   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.
   Configuration (Normal State):       
   Your choices are...         
   Normally Open (NO)       A term used to describe contacts which interrupt the circuit when in their normal position. 
   Normally Closed (NC)       A term used to describe contacts which establish a circuit when in their normal position. 
   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.
   Pole and Throw Specifications:       
   Your choices are...         
   Single Pole, Single Throw (SPST)       Single pole, single throw (SPST) switches make or break the connection of a single conductor in a single branch circuit. They usually have two terminals and are referred to as single-pole switches. 
   Single Pole, Double Throw (SPDT)       Single pole, double throw (SPDT) switches make or break the connection of a single conductor with either of two other single conductors. They usually have three terminals and are commonly used in pairs. SPDT switches are sometimes called three-way switches. 
   Double Pole, Single Throw (DPST)       Double pole, single throw (DPST) switches make or break the connection of two circuit conductors in a single branch circuit. They typically have four terminals. 
   Double Pole, Double Throw (DPDT)       Double pole, double throw (DPDT) switches make or break the connection of two conductors to two separate circuits. They typically have six terminals and are available in both momentary and maintained contact versions. 
   Other       Other, special throw types with more than two poles. Examples include switches that are designed to split loads into separate circuits (e.g., headlamp switch). 
   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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Electrical Switch Specifications
   Maximum Current       The device's maximum nominal (name plate) current-carrying capacity. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Maximum AC Voltage       The device's maximum AC voltage rating. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Maximum DC Voltage       The device's maximum DC voltage rating. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   TTL Compatible?       The switch is compatible with transistor-transistor logic (TTL) circuits.  
   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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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.
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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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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 switch(es). 
   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 or proprietary meter technology (Such as tilt 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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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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