Dimensional indicators and comparators measure where the linear movement of a precision spindle or probe is amplified.

Ball Valves

(2,067 companies)
Ball valves provide tight shut-off and characterizable control. They have high rangeability due to the design of the regulating element and few complications from side loads typical of butterfly or globe valves.

Flow Meters

(1,652 companies)
DP), positive displacement (PD), velocity, and true mass. Differential pressure flow meters obtain the flow rate by measuring the pressure differential and extracting the square root. Choices for DP meters include cone-type devices, elbow tap...

Electromechanical Relays

(724 companies)
...typically have between one and four poles. The image series below illustrates, from left to right, a single pole (SP), double pole (DP), and triple pole switch (3P). Note that, in the last image, the switch is connected to three separate circuits and has...

Pressure Switches

(777 companies)
Pressure switches are actuated by a change in the pressure of a liquid or gas. They activate electromechanical or solid-state switches upon reaching a specific pressure level.

Towers, Masts, and Poles

(318 companies)
Towers, masts and poles elevate, support and/or position personnel and equipment such as antennas, lighting, surveillance cameras or sensors, wind turbines, weather instruments, and power lines.
Number of poles and throws - Volumetric liquid flow switches are also designated as single pole (SP) or double pole (DP), and single throw (ST) or double throw (DT). More information on pipe and switch specifications can be found on GlobalSpec's How...

Vacuum Switches

(102 companies)
NO), or normally closed (NC). They can have single poles (SP), double poles (DP), or more than two poles. The throw type on a vacuum switch can be single throw (ST) or double throw (DT). The switch may be TTL compatible. Electrical characteristics...
Thermostats and thermal switches are electro-mechanical on/off switches that are activated by temperature changes. They are typically used to control heating and cooling systems.

Spur Gears

(256 companies)
Diametral pitch (DP) is the ratio of the number of teeth to the pitch diameter of a gear; a higher DP therefore indicates finer tooth spacing. It is easily calculated by the formula DP= (N+2) / OD, where N is the number of teeth, and OD represents...

Worms and Worm Gears

(206 companies)
...spacing and is expressed in several ways. Diametral pitch (DP) is the ratio of the number of teeth to the pitch diameter of a gear; a higher DP therefore indicates finer tooth spacing. It is easily calculated by the formula DP= (N+2) / OD, where N...

Bevel and Miter Gears

(215 companies)
...in several ways. Diametral pitch (DP) is the ratio of the number of teeth to the pitch diameter of a gear; a higher DP therefore indicates finer tooth spacing. It is easily calculated by the formula DP= (N+2) / OD, where N is the number of teeth, and OD...
Volumetric liquid flow switches are also designated as single pole (SP) or double pole (DP), and single throw (ST) or double throw (DT). More information on pipe and switch specifications can be found on GlobalSpec's How to Select Flow Switches. Meter...

Velocity Flow Switches

(78 companies)
Gas flow switches and liquid flow switches, velocity, are used to measure the flow or quantity of a moving fluid in terms of velocity, such as feet per minute.

Mass Flow Switches

(39 companies)
Mass liquid flow switches and mass gas flow switches are devices used for measuring the flow or quantity of a moving liquid or gas in terms of a unit of mass per unit time, such as pounds per minute. These devices may be sensors with electrical output or may be stand-alone instruments with local displays and controls.