Krohne liquid level switch for extreme conditions!

Normally electronically-based process sensors have problems when dealing with extremes of hot or cold temperatures, and can suffer if subjected to high pressures. So the Krohne Optiswitch 5300C is maybe the exception that proves the rule, with a temperature capability from -196°C to +450°C, and able to withstand pressures from zero up to 160 barg (this is -321°F to +842°F, and 0-2320psig). Despite the name, the Optiswitch is a vibrating fork liquid level switch, available with wetted parts in Inconel Alloy 718, with parts in 316L or Hastelloy C-22.

Krohne switch

Optiswitch (pictured sideways for convenience)

This new Optiswitch is designed and fully approved for extreme process conditions, for Overfill protection duties and high/low level alarm, and should find application in the chemical and oil & gas industries, marine tankers and steam boilers. It is available with a variable insertion length, up to 3m long (for vertical mounting from the top of a tank or vessel), and can be used in SIL2 applications, or can be built into a SIL3 redundant architecture set-up. It is a new and significant addition to the Krohne Optiswitch range, which includes models suitable for both liquid and solids/powder applications.

Interestingly the output options available include a DPDT relay, PNP/NPN transistor outputs, or a switched 8/16mA current indication. The latter output was introduced on the Mobrey ultrasonic level switches back in the 1980s, because it seemed like a good idea at the time, but was never really taken up.

(c) ProcessingTalk.info

@ProcessingTalk

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