3827

Float, Level Sensors

Float, level sensors are designed to measure the level of liquid, gas, or solid within a chamber or tank, confirming the level of liquid in the tank is above or below a set point. This type of sensor, also referred to as float switches, is based on the principle that the vertical position of a buoyant object is dependent on the height of the liquid in which the object is submerged. These sensors generally consist of a float element and a switch element that will activate when the float reaches a predetermined height.

3827 Application Field and Working Principle

The 3827 series is a vertical float level switch with high directivity and based on the principle of buoyancy. It consists of a 3727 series switch which can be connected directly to the float. As the tank level rises, the float is pushed up and the switch is tripped. These switches are often used because of their simple and direct input/output configuration and may be activated in both upwards or downwards directions for on/off control.

The 3827 float switch is commonly used in liquid level alarms, controlling any kind of pumps, controlling machinery in factories, such as coolants, lubricants, and in liquid level indicators used in many types of measurement systems. Typical applications include cooling systems, tanks, and many industrial processes.

The 3827 float switch contains a hermetically sealed magnetic reed switch, a lead wire coil, an O-ring, and a float body. The float is filled with an insulating material and is made of chemically-resistant plastic. The internal reed switch is either normally open (NO) or normally closed (NC). The lead wire coils provide the mechanical connection between the float and the chamber. A strong anti-corrosion material, usually epoxy, is applied to the chamber and wire coil to prevent corrosion.

When the float reaches a preset level, the float switch is activated. A magnet inside the float creates a small electrical field. When this field reaches the reed switch, the contacts close or open depending on whether the switch is normally open or normally closed. The output signal can then be used to control pumps, valves, level indicators, or other types of equipment.

The 3827 series provides high accuracy and sensitivity, as well as a long operating life. The switch is highly reliable and tolerant to most liquids, chemicals, and other environmental conditions. The float is constructed from a corrosion-resistant material that is also transparent for easy visual inspection. The 3827 series is simple to install, use, and maintain, and requires no additional power source for operation.