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Gems Sensors >> Electro-optics Level Switch What is the difference between 'sinking' and 'sourcing?' ?? Sinking and sourcing are terms used to describe how an associated load (the device being turned on or off by the sensor) is powered in relation to the sensor. Sinking, the more widely used of the two, involves the switching of load current (power) supplied by a power source external to the sensor. In a sinking configuration, current passes through the load first, through the output switch of the sensor second and lastly to ground. A sensor with a sinking output switches the ground, or negative, leg of the circuit. In contrast, sourcing refers to a configuration in which the sensor is the source of the current required to power the load. In a sourcing situation, current supplied by the sensor passes through the load second and then to ground. A sensor with a sourcing output switches the positive leg of the circuit.

Gems Sensors >> Electro-optics Level Switch What is meant by "CMOS/TTL logic?" TTL stands for Transistor-Transitor Logic and is considered a logic family. A logic family is a collection of different IC chips that have similar input, output and internal circuit characteristics, but that perform different logic functions. CMOS, which stands for Complementary Metal-Oxide Semiconductor, is another type of transistor logic family that has become more popular than TTL in recent years thanks to higher speed and lower power consumption (e.g. the 0.5 mA associated with the CLS-1200's 5 VDC output option is sufficient to drive only one TTL logic gate versus ten CMOS gates). The majority of today's large-scale ICs, such as microprocessors, use CMOS.

Gems Sensors >> General Is Gems Sensors ISO certified? Yes, Gems has ISO 9001 certification

Gems Sensors >> Electro-optics Level Switch What is the difference between Wet Sink and Dry Sink? Wet sink means the load is energized ("ON") as long as the sensor tip is immersed in fluid. Dry sink means the load is energized as long as the sensor tip is dry (i.e. not immersed in fluid).

Barksdale >> Pressure Switch Is there a repair kit for the explosion proof bourdon pressure switch used in the oil patch market? Yes. Barksdale offers repair kits, B1S-S48SS-L5 or B1S-S48SS, for the non-UL B1X-S48SS models used in the oil patch market. Barksdale does not offer repair kits for our standard explosion UL approved bourdon tube switches.

Barksdale >> Pressure Switch Where can I find a listing of UL approvals for Barksdale pressure switches? Click here to view a listing of UL approved Barksdale pressure switches.