Control systems Magnetic level indicators
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Accessories Contacts Bistable SPDT contacts, fixed on the guide system fitted outside of level indicator body. Enclosure IP65. Operation points are always adjustable on site.
Reed switch contact Ermetically sealed in inert gas Tungsten, Rhodio coated 60 W/VA 1A 250 V Shock and vibration resistance : 30 g 11 ms
Contact data
Transmitter Each level indicator can be equipped with a transmitter, piezoresistive type with 5mm resolution for the direct level reading of the liquid contained into the vessel. Handling We recommend to handle with care subject accessories, in order to avoid any possible damage due to impact during installation and/ or handling. Piezoresistive transmitter A potentiometer (a printed circuit board with a reed chain contact/resistances, welded on it) is placed in a seal tight vertical tube, fitted outside level indicator.
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The total resistance of a known value is measured at the end poles of the potentiometer. The float, moving up and down into the level indicator’s vertical chamber, according to the liquid’s level, activates the potentiometer’s reed chain, thanks to its magnetic field, by closing the signal locally. The total resistance value is 100% at its maximum level and 0% at its minimum level. The end poles of the potentiometer are connected to a converter transforming level reading into 4-20mA output. Transmitter’s characteristics Available reading resolutions (according to the involved distance between process connections) 5 mm Output signal 4-20 mA Max allowable temperature -20 °C +100 °C 62 mm 80 mm
0%
Converter’s housing details
Ø110 mm
Housing Fully in Stainless Steel material, Enclosure IP67 Cable entries: M20.
100%
70 mm
4-20 mA
0%
Ø110 mm
Converter Adjustable on site model, equipped with two 10-turns trimmers for the Z (zero) setting and the G (gain) setting, without any interconnection system.
100%
135 mm
4-20 mA
Resistance input
1 k ÷ 100 k Ohm
Output
4 ÷ 20 mA
4-20 mA
0%
TI-S54-01 CTLS Issue 1
Page 5 of 7
100%
Colima Magnetic Level Indicator Viscorol-PH
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