When selecting multi-range pressure sensors, there are certain things to be cautious of. Often a "one size fits all" pressure transducer is chosen for expected cost savings and inventory control; however this decision turns out to be a bad idea. Issues arise with inaccuracy and poor stability on low range applications where the range output adjustment is simply pushed too far.
February 20, 2013
Application Note: Liquid Level Measurement
Liquid Level
The pressure measured at the bottom of a liquid filled tank is proportional to both the height (head) and density of the liquid. For best results the pressure should be sensed by a pressure transmitter mounted at the lowest point possible on the tank, as shown in Figure 1.
Openings Doors in the Operating Room
Recently, a major Boston-area hospital sought to resolve a problem in its operating rooms (OR). Nurses were complaining about how difficult it was to open the doors to the facility’s 23 operating rooms, 5 of which had just been built. They couldn’t understand why they had to pull so hard to open the doors. A veteran hospital HVAC engineering and design consultant did some investigating and recognized the problem of airborne lint on the sensors controlling OR pressurization.
December 26, 2012
Happy Holidays!
On behalf of all of us here at Setra, we'd like to wish everyone a safe and happy holiday season.
December 12, 2012
How to Monitor Multiple Critical Spaces from One Location
The "central command station" of each floor in a hospital (aka the central nurse's station) plays a critical role in the proper operation of OR suites, isolation wards, and other critical spaces where room condition is crucial. Floor nurses and circulating nurses are tasked with monitoring multiple rooms in their wing, which requires them to physically check each room's condition via the room's condition monitoring device.
On the heels of an economic crisis, the President of the United States signed the American Recovery & Reinvestment Act (ARRA) in 2009 with the goal of:
November 14, 2012
What applications are suitable for capacitive pressure transducers?
Capacitive pressure transducers have earned a reputation for consistently high accuracy and unmatched long-term stability. These sensors find broad application in areas where characteristics rate from important to vital. A few of these include:
November 07, 2012
Understanding Low Pressure Measurement
Low Pressure Measurement
Low pressure measurements are required in various applications such as air flow, static duct and clean room pressures in heating, ventilating and air conditioning (HVAC) and energy management systems. Other applications include use in medical instrumentation, environmental pollution control, boiler combustion efficiency and a wide variety of research and development requirements. While this discussion will center mainly on air flows and pressures, the same principles also apply to liquids. As there are both pressure transducers (voltage output proportional to applied pressure) and pressure transmitters (current output proportional to applied pressure,) we will refer to each as pressure sensors in this application note.
October 24, 2012
8 Operating Features of Capacitance Based Transducers
Capacitance based pressure transducers provide many benefits over other technologies. 8 features that should be considered when choosing a pressure transducer are accuracy, minimal mechanical motion, range capabilities, long term stability, high-level output, media compatibility, electromagnetic compatibility and resistant to harsh environments..
