July 10, 2013
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.
For high line pressure, high differential pressure applications
The pressure difference across an orifice plate, filter, pump, valve, etc. can be sensed with two pressure transducers such as the Model 206. One transducer measures the high side pressure (P1) while the other measure the low side pressure (P2). Pressure media can be any liquid or gas compatible with 17-4 pH stainless steel.
May 22, 2013
Wet-to-wet differential pressure transducers have undergone several significant design and technological improvements recently. The most dramatic of which is the ability to install these units with remote sensors, rather than with traditional embedded sensing elements. A contractor can now easily install remote sensors directly into the pipes while an electrician makes electrical connections between the remote sensors and the transducer via cables or conduit. For industrial applications, contractors can order plumbing-ready cable versions with up to 30 feet of cable. When the local electrical code requires conduit, typically for projects like schools or municipal buildings, contractors can order units in the conduit version.
May 15, 2013
There are a variety of current switches and current transducers currently available for use in HVAC applications. Each product provides different features and benefits for that particular job. This post reviews two common types of current switches and a new technology that eliminates the risk of arc flash hazard during installation.
To better understand the labor and material savings made possible by remote sensors, it is important to compare the traditional method of installing differential pressure transmitters with the new method of installing remote sensors. On a typical job using the conventional method, the mechanical contractor first installs taps with shutoff valves—usually a ball or petcock valve—in the desired locations in the mechanical piping.
March 20, 2013
Current switches, also known as current sensors, are used to monitor the operation of motors, pumps, fans, compressors, lights, and other equipment. Two common types of current switches currently available are fixed point and adjustable set point switches. Fixed current switches are designed with a single pre-determined set point and are beneficial because they are installed on cold circuits requiring no adjustment.
March 06, 2013
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.
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
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.
November 14, 2012
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:
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