Oxygen is present in a small amount in the air and many substances, but it’s also found in pretty big amounts in water. It’s important to control the concentration of oxygen in the water in order to avoid excessive corrosion of the pipes in industrial facilities and ensure that production processes are performed under optimal conditions. This can be achieved by measuring the dissolved oxygen concentration with an oxygen meter.

The Oxygen Measurement Instruments oxygen sensor (ODO) used by most portable oxygen meters is an electrochemical cell. This sensor is sensitive to temperature and requires regular recalibration to remain accurate. Because they rely on a chemical process to measure ambient oxygen, these sensors are not as robust as their optical counterparts. For this reason, ODO sensors are typically used for safety alarms, such as room oxygen depletion detectors that monitor ambient oxygen levels in rooms containing stored compressed gases.

Behind the Sensors: Exploring the Expertise of Gas Monitoring Specialists

Pulse oximetry is a non-invasive method of measuring oxygen saturation by shining a light through the fingertip or earlobe. A clip-like device called a probe is placed on the finger or earlobe. The device emits both red and infrared light, which are absorbed differently by hemoglobin in the blood. The ratio of the absorbed light is proportional to the level of oxygenated hemoglobin in the blood. The result is displayed on a screen with two numbers, the oxygen saturation percentage and heart rate.

If you’re using a pulse oximeter at home, be sure to read and follow the manufacturer’s instructions carefully. This will help you get the most accurate results from the device. For example, find a comfortable position, and be still for at least a minute to ensure that the readings are stable before taking a reading.