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Emco Controls A/S
Høgevej 6
DK- 3400 Hillerød
Denmark

Phone +45 4576 94 00
Fax +45 4576 94 01

emco@emco.dk

Emco Controls A/S receives the Gazelle award from the leading Danish business newspaper Borsen in recognition of being one of Denmark's fastest growing companies.

 

    

 

Float Level Switch Construction

 
 
EMCO liquid level switches have been manufactured since 1973 serving customers reliably in many different industries including the shipbuilding industry.
 
The present liquid level switch is developed by our engineers backed up by more than 30 years of know-how gained by close cooperation with our valid customers.

The initial stage of the new development was to set up the requirements to the design of the level switch. Five major requirements were identified:
 
1. Easy electrical and mechanical mounting
2. Good corrosion resistance of the switch housing
3. Modern design
4. Low manufacturing costs
5. High degree of flexibility
The engineers within the company were able to solve 4 out of the 5 major requirements. The design of the level switch was done by an industrial designer.
 
Application

The EMCO level switch is designed to control the liquid level in vessels containing corrosive or non-corrosive liquids.

Alarm duty

The standard level switch with float code 01 is used for signalling high or low alarm points. The signal may be used for plant shut down or emergency override control.

Level switch with float code 05 is intended for side mounting with alarm point with difficult accessibility.
Level switch with float code 04 is for vertical mounting on top of the vessel.
Level switches with long levers f. d. code 50 are used for alarm duty with unstable liquid surface or with insulated vessels requiring long levers undisturbed movement.
 
Liquid level interface, minimum difference in density 0,2
 
Pump/valve control
 
Two level switches with float code 01 are used for pump control where one switch starts the pump by activating a holding relay and the other switch brakes the holding relay when the desired liquid level has been reached.
Function
 
The EMCO float switch can be mounted horizontally or vertically, but horizontal mounting is the most common.
 
The float lever carries a permanent magnet which is opposed by a similar magnet mounted in the switch housing. The magnets having the same pole directed toward each other are separated by a non magnetic
diaphragm.
 
The glandless construction offers excellent sealing.
The EMCO float switch can be mounted horizontally or vertically

Construction
 
The EMCO float switch consists of three main parts :
 
1. Housing with switch, electrical or pneumatic
2. Mounting flange
3. Float
 
The modular construction of the EMCO float level switch offers excellent flexibility to suit customers' requirements.

Features
 
* Easy to install
* Very high flexibility
* Fast delivery
 
* Type approved by major classification societies, including Det Norske Veritas (DNV), Lloyds Register of Shipping (LRS), Bureau Veritas (BV) and American Bureau of Shipping (ABS).
 
Applicable for high temperatures

Technical Specifications
   
Switch housing
: Stainless steel, as option aluminium
Wetted parts : Stainless steel AISI 316, as option PP and PTFE
Specific gravity : Standard min. 0,7; option min. 0,5
Max. working pressure
: Standard flange 100 bar
  Standard flanges to DIN or ANSI/ASME norm
Max.working temperature. : Depending on switch type
Enclosure
: IP 65,
  IP 68 with 3x1,5 mm2 ships cable on request
Electrical gland connection : M20 x 1,5 mm
Option : Hirschmann, Schaltbau or other make of connector
 
Float Level Switch Construction
 
Related documents:
Accessories for the EMCO Level Switch
Float Level Switch Brochure
Side Mounted Level Switch Type 210FN01
Side Mounted Level Switch Type 210FN02
Side Mounted Level Switch Type 210FN05
Side Mounted Level Switch Type 210FN25-100
Side Mounted Level Switch Type 210FN25-100
 
On the level switch above you have to choose the length of the lever and as a consequence of that you will get a different hysteresis. 

Read more

Top Mounted Level Switch Type 210FN03
Level Switch Type 210FN03
 
The level switch type 210FN03 is mounted vertical and it has a variable hysteresis.

Read more

Top Mounted Level Switch Type 210FN04
Level Switch Type 210FN04 Top Mounted
 
This top mounted type is made with a cranked lever.

Read more

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