For many industrial applications, multiple sensor types are required—liquid level sensors, temperature sensors, pressure sensors, flow meters, or others.
These various requirements can be expensive and difficult to integrate. But with combination switches from SMD Fluid Controls, the cost can be contained and assembly simplified.
What Are Combination Switches?
Simply put, combination switches are single units that combine the functions of two or more separate types. SMD Fluid Controls a leading designer and manufacturer of liquid level sensors specializing in combination switches like level/temperature sensors, level/pressure sensors, and more.
Combination Level and Temperature Sensors
Almost nothing exemplifies SMD’s commitment to custom problem solving like its combination level and temperature switches. The most standard and custom SMD float level switches can be assembled with a thermocouple, RTD or thermostat switch to create an effective combination level/temperature sensor.
How does each of these temperature-sensing components work?
Thermocouples
Thermocouples are ideal for interfacing to existing meters, or in applications involving extreme high-temperature environments. Ceramic filters can be used in place of standard potting to provide a level and temperature sensing to 250º C. These higher temperature devices are ideal for fat food fryers and food processing equipment.
Resistive Temperature Detectors (RTDs)
Resistive temperature detectors provide offer high accuracy and linearity at a low cost. Units integrating RTDs are good for applications involving general-purpose appliance and medical applications.
Both thermocouples and RTDs can be easily incorporated in full size and miniature products.
Thermostat Switches
These by metal snap-action switches can be used to provide good temperature protection in most fluid systems.
Thermostat switches are designed to be normally open or normally closed and will change state at a specified temperature. These slightly larger devices require full-size stems and an additional inch at the bottom of the stem.