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Sinking VS Sourcing Digital Outputs – Float Switches

Sinking VS Sourcing Digital Outputs A sinking digital (input/output) provides a grounded connection to the load, whereas a sourcing digital(input/output) provides a voltage source to the load. Figure 1: Sinking digital output is connected to a sourcing digital input. In …

Custom Tubing for Standard Bubble Sensors

Custom Tubing for Standard Bubble Sensors Proper bubble sensor functionality is partially dependent on the tubing that is used with it. For unique tubes (thick walls, rigid tubes, etc.) we recommend sending us a sample of your tubing using the …

Specific Gravity And The Right Float Switch Selection

Understanding Specific Gravity & Float Switch Selection Specific Gravity in liquid level measurement refers to the ratio of the density of a substance within a tank. For fluid monitoring levels, this factor is an important one to consider as it …

Float Switches- Normally Open vs Normally Closed

Float Switches- Normally Open verses Normally Closed And why you should care… Float switches, in very basic terms, are used to detect the presence or absence of liquid (or another substance) in a tank. By measuring the level, it’s possible …

S256 Load Cell Application Notes

S256 Force Sensor Application Notes  General Description: The S256 Force Sensor is a monolithic aluminum bodied structure with a proprietary thin film technology strain gauge applied, capable of producing an analog voltage output in response to loading of up to …

S251 Application Notes & Mounting Suggestions

S251 Application Notes & Mounting Suggestions General Description: The S251 Sensor is a family of monolithic aluminum or stainless steel bodied structures (depending on capacity) with a proprietary thin film technology strain gage applied, capable of producing a linear, analog …

Technical Note: Signal Conditioning – I2C Output

Technical Note: Signal Conditioning – I2C Output I2C (Inter-Integrated Circuit) is a communication protocol that is often used to transfer data from sensors to processors and micro-controllers. Many of our sensors are provided with an I2C output or can be …

Technical Note: Combined Bubble and Occlusion Sensors

Combined Bubble and Occlusion Sensors Strain Measurement Devices has core competencies in load cells, ultrasonic sensors, electronics design, and mechanical design, because of our robust sensor lines we have the unique opportunity for space saving, combined sensors. Solving multiple sensor …

Technical Note: Bubble Sensors – Tubing Selection

Bubble Sensors – Tubing Selection Strain Measurement Devices’ standard bubble sensors will function with almost any soft or semi-rigid plastic or rubber tube. However, SMD can also design sensors for almost any tubing material. The main considerations with any tube …

Technical Note: Bubble Sensors – Bubble Size Calibration

Bubble Sensors – Bubble Size Calibration Do I need a calibrated bubble sensor? Many applications only require knowing whether the tube is full of air or water, i.e. gross air detection; the size of the minimum bubble detected is often …

Technical Note: Bubble Sensors – Test Pin

Bubble Sensors – Test Pin SMD Bubble Sensors have an optional test pin that is often required for medical device applications. On our standard sensors, the last digit of the part number denotes whether the test pin is enabled or …

Technical Note: Bubble Sensors – Technology Overview

Bubble Sensors – Technology Overview What is the operating principle for SMD (Strain Measurement Devices) bubble sensors? Most SMD sensors are designed to operate non-invasively through the walls of a tube without the use of grease or other acoustic coupling …