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Electrical Output:

Sensor Technology:

Pressure Reading:

Working Pressure Range:

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Vacuum Range:

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Accuracy:

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Operating Temperature:

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Media:

Display:

Features:

Help with Pressure Transmitters specifications:

Signal Output
   Electrical Output      Signal output is the type of electrical signal produced.
   Your choices are...         
   Analog Voltage       The output voltage is a simple (usually linear) function of the measurement. 
   Analog Current       Analog current levels or transmitters such as 4 – 20 mA are suitable for sending signals over long distances. Current is imposed on the output circuit proportional to the measurement. Feedback is used to provide the appropriate current regardless of line noise and impedance. 
   RS232 / RS485       RS232 and RS485 are serial communication protocols that transmit data one bit at a time. RS232 provides a standard interface between data terminal and data communications equipment. RS485 can be transformed into a multi-point application. 
   Parallel       Parallel outputs such as printer ports and Centronics ports transmit data in groups of bits. The general-purpose interface bus (GPIB) or IEEE 488 is a popular parallel interface for connecting computers, peripherals, and laboratory instruments. 
   HART® Protocol       The highway addressable remote transducer (HART®) protocol uses 1200 baud frequency shift keying (FSK) based on the Bell 202 standard to superimpose digital signals on conventional 4-20 mA analog signals. This enables two-way communication and facilitates the transmission of information beyond normal process variables to and from smart field instruments. The HART protocol communicates without interrupting the analog signal and allows a host application (master) to receive two or more digital updates per second from a field device (slave). Because they are phase-continuous, the digital FSK signals do not interfere with the analog 4-20 mA signals. HART is a registered trademark of the HART Communication Foundation. 
   PROFIBUS®       The process fieldbus (PROFIBUS®) is a popular, open communication standard used in factory automation, process automation, motion control, and safety applications. PROFIBUS is standardized in IEC 71158 and IEC 61784 and is suitable for both fast, time-critical applications and complex communication tasks. PROFIBUS is a registered trademark of PROFIBUS International. 
   DeviceNet       DeviceNet uses controller area network (CAN) network protocol to connect industrial devices such as limit switches, photoelectric cells, valve manifolds, motor starters, drives, and operator displays to programmable logic controllers (PLCs) and personal computers (PCs). 
   FOUNDATION Fieldbus       The FOUNDATION fieldbus is a serial, all-digital, two-way communication system that serves as a local area network (LAN) for factory instrumentation and control devices. It uses a line or tree topology and distributed data transfer (DDT). In the hierarchy of digital networks, the FOUNDATION fieldbus is on the lower end. 
   Ethernet       Ethernet is a local area network (LAN) protocol that uses a bus or star typology and supports data transfer rates of 10 Mbps. The Ethernet specification is the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. To handle simultaneous demands, Ethernet uses carrier sense multiple access / collision detection (CSMA/CD) to monitor network traffic. 
   Frequency       The output signal is encoded via amplitude modulation (AM), frequency modulation (FM), or some other modulation scheme such as sine wave or pulse train; however, the signal is still analog in nature. 
   Special Digital (TTL)       Devices produce digital outputs other than standard serial or parallel signals. Examples include transistor-transistor logic (TTL) outputs. 
   Switch / Alarm       The output is a change in state of a switch or alarm. 
   Other       Other unlisted, specialized, or proprietary outputs. 
   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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Technology Used
   Sensor Technology:       
   Your choices are...         
   Mechanical Deflection       An elastic or flexible element mechanically deflects with a change in pressure, for example a diaphragm, Bourdon tube, or bellows. 
   Piston       A sealed piston / cylinder measures changes in pressure. 
   Strain Gauge       Strain gages (strain-sensitive variable resistors) are bonded to parts of the structure that deform as the pressure changes. These strain gages are typically used as elements in a Wheatstone bridge circuit, which is used to make the measurement. 
   Semiconductor Piezoresistive       Piezoresistive sensors are based on semiconductor technology. The change in resistance is not only because of a change in the length and width (as it is with strain gage) but because of a shift of electrical charges within the resistor. These are very sensitive devices. 
   Piezoelectric       Piezoelectric pressure sensors measure dynamic and quasi-static pressures. The common modes of operation are charge mode, which generates a high-impedance charge output; and voltage mode, which uses an amplifier to convert the high-impedance charge into a low-impedance output voltage. 
   Thin Film       An extremely thin layer of material is deposited on a substrate by sputtering, chemical vapor deposition, or other technique. This technology incorporates a compact design with good temperature stability. There are a variety of materials used in thin film technology, such as titanium nitride and polysilicon. 
   MEMS       Microelectromechanical systems (MEMS) are typically manufactured by silicon surface micromachining. 
   Variable Capacitance       The capacitance change results from the movement of a diaphragm element. The deflection of the diaphragm causes a change in capacitance that is detected by a bridge circuit. 
   Vibrating Element       These devices use a vibrating element technology, such as silicon resonance. 
   Other       Other unlisted, specialized, or proprietary 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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Pressure Reading
           
   Your choices are...         
   Absolute       Absolute pressure is relative to a perfect vacuum. 
   Differential       Differential pressure is the difference between two input pressures. 
   Gauge       Gauge pressure is the pressure measured above the local atmospheric pressure. It is the most common pressure measurement. 
   Compound       Devices can display both positive and negative (vacuum) pressures. 
   Sealed       Sealed gauge pressure is relative to one atmosphere at sea level (14.7 psi) regardless of local atmospheric pressure. 
   Vacuum       Vacuum pressure is lower than atmospheric pressure. 
   Other       Other unlisted, specialized, or proprietary measurement types. 
   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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Specifications
   Working Pressure Range       The maximum allowable pressure at which a system or piece of equipment is designed to operate safely. The extremes of this range should be determined in accordance with the expected pressure range the device must operate within. It is common practice that this value should not exceed 75% of the devices maximum rated range. For example: if the device has a maximum rated range of 100 psi then the working range should not exceed 75 psi. 
   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.
   Vacuum Range       Vacuum range is the span of pressures from the lowest vacuum pressure to the highest vacuum pressure (e.g., from 0 to 30 inches of mercury VAC). 
   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.
   Accuracy       The difference (error) between the true value and the indication expressed as percent of the span. It includes the combined effects of method, observer, apparatus and environment. ASME B40.1 and DIN accuracy grades are frequently used: Grade 4A (0.1% Full Scale) Grade 3A (0.25% Full Scale) Grade 2A (0.5% Full Scale) Grade 1A (1% Full Scale) Grade A (1% middle half, 2% first and last quarters) Grade B (2% middle half, 3% first and last quarters) Grade C (3% middle half, 4% first and last quarters) Grade D (5% Full Scale) Measurement Accuracy (% of Full Scale). In cases where the accuracy differs between middle span and the first and last quarters of the scale, the largest % error is reported. 
   Search Logic:      All matching products will have a value less than or equal to the specified value.
   Operating Temperature       The full-required range of ambient operating temperature. 
   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.
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Media
           
   Your choices are...         
   Liquid       The device measures the pressure of liquids. 
   Gas       The device measures the pressure of gases. 
   Hazardous       The device is rated by the manufacturer for hazardous duty. 
   Other       Other unlisted, specialized, or proprietary materials to measure. 
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Display
           
   Your choices are...         
   Analog Meter       The device has an analog meter or simple visual indicator. 
   Digital       The device has a display for numerical values. 
   Video       The device has a CRT, LCD or other multi-line display. 
   Other       Other unlisted, specialized, or proprietary displays. 
   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
           
   Your choices are...         
   Intrinsically Safe       Product ensures that the available electrical and thermal energy in the product is always low enough that ignition of a hazardous atmosphere does not occur. 
   Temperature Output       Devices provide temperature measurement outputs. 
   Temperature Compensation       Devices include built-in factors that prevent pressure measurement errors due to temperature changes. 
   Negative Pressure Output       Negative pressure outputs are available with devices that provide differential pressure measurements. 
   Alarm Indicator       Devices have a built-in audible or visual alarm, not just a switch or relay closure. 
   TTL Compatible Switch       The output switch is compatible with transistor-transistor logic (TTL). 
   Submersible       The device is meant to be submerged during operation. 
   Other       Other unlisted, specialized, or proprietary features. 
   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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