The sensing and measurement of physical quantities through small changes in electrical capacitance is scarcely a new concept. The natural benefits of this approach were recognized for many years. But it was not until Setra engineers introduced new materials, new designs, and innovative, dedicated circuitry that the techniques full potential was realized in the practical, real world of pressure measurement.
HVAC controls are built around a number of parameters that affect a building’s interior environment; temperature, humidity, air intake, and air exhaust. Reliable inputs are critical to effective control. Setra provides robust, accurate sensors to help you control your air handling equipment with ease, efficiency, and dependability.
Selecting a low-differential pressure transducer for critical-care ventilation is one of the most important decisions mechanical designers, engineers and architects can make. These transducers perform precise monitoring and contamination control of isolation-room pressures in critical environments. Properly selected and installed, they help prevent the spread of communicable diseases like tuberculosis (TB).
August 07, 2013
Health Risks of Failing to Properly Monitor Building Humidity
There are many risks associated with unmonitored humidity levels in buildings. The most significant of which is the health risks posed to the building’s occupants. Sick Building Syndrome can severely affect occupants’ comfort and productivity, but more alarming are some of the respiratory and other health ailments which can arise from unmonitored humidity levels.
July 24, 2013
How Do Shock & Vibration Affect a Pressure Transducer?
Shock & vibration are two potential mechanical problems for pressure transducers.
Shock is a sudden, unexpected impact that transmits energy to a device in a relatively short time interval. For a pressure transducer, that energy passes through the stainless steel up through the housing. Shock may originate from rough transportation and handling, such as by trucks, forklifts and conveyors. Alternately, shock can be caused simply by dropping the transducer on the shop floor or by an assembler slamming a cabinet door adjacent to it. A transducer may not be damaged by a single shock, but can experience fatigue failure with numerous low-level shocks over the course of its life.
July 10, 2013
Will Extreme Temperatures Cause Transducer Failures?
Excessively high temperatures are a common source of pressure transducer difficulties.
Like most other electronic equipment, pressure transducers are effected by temperature, shock and vibrations. They consist of numerous components that only function within specified temperature ranges. Transducers exposed to temperatures exceeding those ranges during the assembly process can be adversely affected.
March 06, 2013
How to Select Multi-Range Pressure Sensors
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.
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 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.
