Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: is there a retainer for this unit to hold it in a panel?
Document: It works. Like another reviewer said, pay close attention to the part number. This is the TA-4 (relay output), and the TA-7 (SSR output) is the one I really wanted, but oh well. I can't fault this PID unit for my lack of paying closer attention to the part number offered.
At some point, the coil MAY get a surge and anything can happen, or the physical contacts may arc and weld themselves together, rendering the unit useless. I have the unit plugged into a small water tank as a test and it keeps clicking (at and around the target temp). I don't think it will last too long in this condition, however, this is how it was designed and how it works.It's brand new, so I can't give it poor marks for MAY BE failing soon.
dont have time to ship a little package back to this seller so i just accepted that its crap and dosent work the switch side for the relay SSR dosent work and dosent controller my heater at all it glitches when it first comes on so i just stuck it on my shelf and took a loss on it i hope this seller inspects their products better
Works as advertised. I used this in a DIY incubator for chicken eggs. After auto tuning I made a couple tweaks to the PID parameters and it is controlling my incubator (two 60 watt light bulbs are the heating element) to within 0.5 degrees F. It does have a tendency to creep up above the setpoint a half a degree or so to compensate. I expect my tweaking with the PID params is causing the issue, but it is so stable that I don't mind the error.
Very good for the money. Simple to install, easy to program.Will buy more in the future if I'll need it again.
Used with an ASCO valve to keep my hot liquor tank and mash tun up to temp in my home brewery. Does what its supposed to.
This turned out to be the wrong product for my application, I replaced it with theSNR version. Both have the same issue, very poorly done documentation, utterly lacking in details. They are listed as having at least two different auto-tuning algorithms, but there is no way given to select between them. They are listed as supporting a CU50 thermocouple, but with a CU50 they display an extremely low temperature which the controller's offset setting does not have sufficient range to correct for, at least not in Fahrenheit.
The instructions truly are awful - after speeding a week on it and reading other pid controller instructions I was able to understand must of the parameters.Once it is set up it is truly impressive.
Now I know exactly what the temperature is while in operation.
Note that the RNR part of the model number is really important. That means it switches its own built-in relay for the "output". I personally wanted one that could drive an external solid state relay. If that's what you're looking for then what you really want in the SNR version of this. Other than that, it's great!
Answer: no