An issue with ultrasonic clamp-on in general is whether there is documentation for a medium/material's speed of sound at various working temperatures.
Those clamp-ons that have a list of liquids to select from typically use the speed of sound for standard, 25 Deg C, conditions. Sometimes...
Siemens high temperature metal block sensors, rated to 230 °C (446 °F).
pg 2 https://cache.industry.siemens.com/dl/files/334/109765334/att_1114955/v1/sitransf_fs220_fi01_en.pdf?download=true
The last copy of B40.100 (2005) I saw did not specify square or hex dimensions on the gauge stem.
The spec sheet for any particular brand/model gauge probably provides the spec, but you need to know the brand and model, not always evident for installed gauges.
flame sensing is a safety circuit that is used to prove flame and has to fail safe. Commercial products pass agency approval. Buy commercial flame sensing/safety components.
Two approaches, either of which will make the cost of running another STP cable out the to the tank look cheap, by comparison.
- HART multidrop: Uses HART enabled AI card with pass through to pass the hart signals through to your asset management software.
- HART multiplexor: A HART mux...
A sump has a wide deadband level switch that turns the pump on at the high point, latches the contact to keep the pump running until the level hits the low point where the control contact changes state, the pump stops and the control contact latches in the OFF position until the level switch...
>I think I would need the Advanced Controller then (one with the aux input), correct?
The 'advanced' controller would have to be a 'dual loop' controller (2 independent loops, typically capable of cascade control) to have each input control a separate output, which it might or might not be, I...
>Hmm I wonder If I could use one of those "Standard" temperature controllers plus a "dumb" pressure switch like this Dwyer, and put the pressure switch in series with the relay on the temp controller that shuts off power to the computer?
Yes, when the alarm/output contacts are wired in series...
Loop controllers differ from PLCs; which is why they're still around and commercially available some decades after PLCs came into being.
The PID loop controllers, called "advanced Process controllers", are configured by keypad/display, picking from a list of options for various parameters, like...
What direction is the error? Is the error a low error, below the expected temperature value?
I have a buddy who runs an ISO 17025 cal lab. He once discovered that the MgO mineral insulation (MI) used to insulate the RTD element from its protection sheath had entrained moisture in it, which...
1. I'm lost on your distinction of a controller and an independent measuring system. idk.
2. I don't know what 'nominal rating' means.
Generally, temperature systems are accuracy rated on their span.
Specifically, accuracy statements for digital PID controllers are always based on "full...
The temperature sensor manufacturers have reps or distributors and have catalogs of 300 pages. And somewhere in the catalog most of them will offer an RTD with a 90 Deg bend. I took the graphic from a Pyromation catalog. Other vendors have similar stuff. Availability is largely geography...
No. The straight RTD element, along with its connection head on the right, fit into the thermowell and the protection head shown on the left. So, no, that is not a bent element.
A thermowell like that is chunk of stainless steel that completely misses the concept of an immersed, reduced tip...
>Will I be able to directly connect the heater to that PID controller, or will I need an additional component?
Depends on the "sizing" of the electric heater. The output has to be able to carry the current load of the heater. There are no specs for that controller, so the rating of the...
>the specific requirements that the PT100 needs to meet
assuming key #2 is the RTD:
your diagram seems to show a reduced tip RTD.
- reduced tip, main section 1/4" diameter,
- stainless steel sheath, length? depends on the setup
- 3 wire
- presumably liquid boils off so you might get an RTD that...
On the data logger end, maybe the multimeter market has something for you. (googled peak capture data logger)
Fluke 287 True RMS Electronics Data Logging Multimeter with TrendCapture @ $760 (Amazon has it for $655)...
A great resource is the massive 3200 page tome, Tony Kuphaldt's Lesson in Industrial Instrumentation, a text book that covers a huge spectrum of practical instrumentation.
You can skip the first dozen chapters on math and electricity and get right into the instrumentation part.
Being pdf, it...
