|
|
| |
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.
|
|
|
|
| |
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.
|
|
|
|
| |
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.
|
|
|
|
| |
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.
|
|
|
|
| |
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 signal 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.
|
|
|
|
| |
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.
|
|
|
|
| |
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.
|
|
|
|
| |
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.
|
|
|
