Patient monitors are used in clinical environments (e.g., operating rooms, emergency rooms, intensive care, critical units and, increasingly, patient homes) to monitor and display the patient’s vital signs, including ECG, SpO₂ (saturation of peripheral oxygen), blood pressure, respiration, and temperature. Patient monitors can be standalone or multi-parameter monitors. Honeywell sensors have been used in applications with blood pressure monitoring, glucose monitoring, respiratory monitoring, and temperature monitoring.

Blood pressure monitoring may be measured through either an inserted pressure transducer or non-invasively through a blood pressure cuff (NIBP).

Glucose monitoring measures the glucose level in the interstitial fluid. Continuous glucose monitoring allows examination of how the blood glucose level reacts to insulin, exercise, food, and other factors. Potential sensor applications for Honeywell sensors include the continuous glucose monitors used in critical care units, operating rooms, or patient recovery, where pumps are used to draw blood and/or return the blood to the body. Sensors could also be used in selected handheld glucose monitors if pressure needs to be regulated when drawing blood.

Respiratory monitoring displays critical respiratory indices including capnography, which monitors the concentration or partial pressure of CO₂ in the respiratory gases, and spirometers, which measure direct in- and out-flow. Temperature monitoring consists of the monitoring of patient temperature.