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Vacuum 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.)

Vacuum Switch Set point Range:

Vacuum Deadband:

Operating Temperature:

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.)

Additional Pressure Reading:

Switch Technology:

Normally Open/Closed:

Number of Poles:

Number of Throws:

Switched Current:

Switched AC Volts:

Switched DC Volts:

Additional Signal Output:

Features:

Help with Vacuum Switches specifications:

Specifications
   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.
   Vacuum Switch Set point Range       This is the set point range through which the vacuum switch operates. It may have an adjustable or fixed range. 
   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.
   Vacuum Deadband       Deadband is the difference between the actuation point and the re-actuation point in a vacuum switch. 
   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.
   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.
   Additional 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. 
   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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Switch Characteristics
   Switch Technology:       
   Your choices are...         
   Electro-mechanical       Mechanical contacts, relays, reed switches, etc. 
   Solid-state       Electronic switch, 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.
   Normally Open/Closed:       
   Your choices are...         
   Normally Open       Switch is 'open' until set switching value is seen. 
   Normally Closed       Switch is 'closed' until set switching value is seen. 
   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 Poles:       
   Your choices are...         
   Single Pole       Single set of contacts for switching just one electrical line. 
   Double Pole       Double set of contact for switching two electrical lines simultaneously. 
   3 or more Poles       More than two sets of contacts 
   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 Throws:       
   Your choices are...         
   Single Throw       Simple on/off. 
   Double Throw       A common contact is switched between one and the other of two contacts. 
   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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Switch Electrical Characteristics
   Switched Current:       The maximum current that must be switched. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Switched AC Volts:       The maximum Volts (AC) that must be switched. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Switched DC Volts:       The maximum Volts (DC) that must be switched. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
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Additional Signal 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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Features
           
   Your choices are...         
   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). 
   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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