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EHELP: Temperature Measurements in Liquid

EHELP: Temperature Measurements in Liquid

Q: We want three 100 ohm, .00385 Alpha RTDs to measure heated glucose in railroad cars. We heat the glucose to 140-150°F, and want to use a 5-foot long flexible sensor with a head on top containing a terminal strip. We also want to run flexible conduit from the head with copper wire for easy replacement access. We can fabricate a bracket that would span the midway above the railcar that supports the housings and includes holes that allow the flexible RTDs to drop down for installation. What do you offer that is a fit for our application?

Published: June 28, 2016

Update on Moore Industries Battery Lifing Comparison on its THZ and BULLET WirelessHART Adapter

Update on Moore Industries Battery Lifing Comparison on its THZ and BULLET WirelessHART Adapter

On June 13, 2014, Moore Industries began a battery lifing comparison pairing up the BULLET WirelessHART Adapter and the THZ Dual Head Smart HART Temperature Transmitter. The purpose of the test was to identify how much longer battery life could be conserved if a THZ was configured only to turn on when a measurement was required versus keeping the transmitter on non-stop. 

Published: June 13, 2016

Temperature Q&A with JR Madden: What is the least expensive way to speed up sensor response time in a thermowell?

Temperature Q&A with JR Madden: What is the least expensive way to speed up sensor response time in a thermowell?

Q. What is the least expensive way to speed up response time of a sensor installed inside of a thermowell? We have a reactor associated with a quickly changing process and need to be able to control any sudden changes. What do you suggest?

Published: June 8, 2016

Temperature Q&A with JR: We are seeing false readings in our outdoor temperature measurement application due to environmental exposure

Temperature Q&A with JR: We are seeing false readings in our outdoor temperature measurement application due to environmental exposure

Q: We have several outdoor temperature applications where we measure the temperatures of pipes running alongside cooling towers. These sensors are in several different locations and zip-tied to the outer surface of the cooling pipes. Our problem has been that exposure to rain, sun and heavy snow causes signals to drop off or spike. We believe moisture is getting into the wire jacket and the environmental exposure is causing false readings. The sensors we use have a PVC jacket over the lead wires and it shows cracking over time. We need to replace the sensors and would like a 4-20mA output signal to go from our junction box out to the field instead of running the sensor lead wires all the way back to our monitoring system. What type of solution do you have for this?

Published: May 25, 2016

Temperature Q&A with JR Madden: Process Temperature Measurements Shift With Outside Air Fluctuations

Temperature Q&A with JR Madden: Process Temperature Measurements Shift With Outside Air Fluctuations

Q. We have several short thermowells in our process, ranging from 2-inches to 6-inches. Our process is very stable, but we have noticed a temperature measurement shift when the outside air temperature rises or falls. We have tried calibration, but it still doesn’t correct the temperature swing we see. What would you suggest we change that will prevent these temperature swings?

Published: April 27, 2016
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