Any recommendations for data loggers appreciated.

JohnNY · January 2022

Since I’m striking out with a quick answer to an affordable ultrasonic flow meter, please recommend a data logger.

I need to record the Delta—T of a couple risers over a week or so of conditions.

Many thanks,
JC

EBEBRATT-Ed · January 2022

We used to have a Supco set up where I worked and It was ok as far as I know

ratio · January 2022

I've been eyeballing one of these: https://www.tequipment.net/Graphtec/GL240M/Data-Recorders/ for a while now. This model will accept input from one wireless sensor as well. I think it'll do a nice job of logging an entire system (including outdoor conditions via the wireless sensor), with the WiFi module it should be able to be downloaded on a drive-by. It might be overkill for your needs. I like it because (if I'm reading things right) I can get many days of 1-second-interval recordings and plot all ten wired inputs in relation to each other.

I haven't, as yet, actually bought one.

Zman · January 2022

I have a decent size fleet of Hobo loggers. Temp and humidity, state loggers, motor loggers and this one that will do what you need https://www.onsetcomp.com/products/data-loggers/ux120-014m

cross_skier · January 2022

Cheap Chinese one that works and can be calibrated is TEKCOPLUS. Four wired channels for about $125 on Amazon. Writes .txt file to sd card which can easily be pulled into Excel for analysis. Manual is not good.

Thermometer Thermocouple K Type 4-Channel Multi Channel SD Card Data Logger Temperature with Beeper and LED Alarm + 2 Bead Type Probe Wire Sensor https://www.amazon.com/dp/B01HD4WMS8/ref=cm_sw_r_cp_apan_glt_i_AQ80STDNE50YSWWDFWNW

JohnNY · January 2022

ratio said:
I've been eyeballing one of these: https://www.tequipment.net/Graphtec/GL240M/Data-Recorders/ for a while now. This model will accept input from one wireless sensor as well. I think it'll do a nice job of logging an entire system (including outdoor conditions via the wireless sensor), with the WiFi module it should be able to be downloaded on a drive-by. It might be overkill for your needs. I like it because (if I'm reading things right) I can get many days of 1-second-interval recordings and plot all ten wired inputs in relation to each other.
I haven't, as yet, actually bought one.

Wow. I love that wireless sensor option. It looks a bit too techy for my liking but if I can ignore/bypass the stuff I don't need to know then this is probably the right device.

JohnNY · January 2022

Zman said:
I have a decent size fleet of Hobo loggers. Temp and humidity, state loggers, motor loggers and this one that will do what you need https://www.onsetcomp.com/products/data-loggers/ux120-014m

Great. So, taking a look at this one, it seems I have to purchase the thermocouples separately from the unit, yes? That may be the situation with all of them.

tim smith · January 2022

I've always heard Hobos are pretty good. Also look into Monit sensors.
Good luck John
Tim

ratio · January 2022

The software for the GL240 is available here: <https://www.graphtecamerica.com/data-logger/gl240/download > if you want to take it for a spin. It's obviously a translation, but far from the worst I've seen.

The inputs are isolated from everything, can be configured for a number of thermocouple types, can read a 24 VAC input directly, and can read a transducer with a 0-10 volt output (or mA output with a resistor).

I was thinking that it would allow me to instrument a refrigerant system with pressure & temperature transducers; supply, return, & outside air; & still have a few inputs left over to capture something else of interest.

Zman · January 2022

JohnNY said:

Zman said:
I have a decent size fleet of Hobo loggers. Temp and humidity, state loggers, motor loggers and this one that will do what you need https://www.onsetcomp.com/products/data-loggers/ux120-014m
Great. So, taking a look at this one, it seems I have to purchase the thermocouples separately from the unit, yes? That may be the situation with all of them.

Yes, the thermocouples are sold separately.

ratio · January 2022

For thermocouples, I've taken to (having the company) buy a roll of bulk wire & a bag of plugs & fabricating my own. I just twist the ends together to make the junction & leave them installed, it seems to last good enough for me (startup guy, rarely back to a job after a year or so). For large refrigerant systems, I'll stick the junction in the solder where I put an access teat since I have a Fieldpiece digital that uses a Type K for it's temps. I've found them particularly useful on direct fired make up air units.

mattmia2 · April 9

There is no reason a thermistor isn't close enough for what you're doing, just need a device that knows how to periodically read its resistance and convert that to temp.

I've got to think academic labs have the data logger equivalent of a nanovna where a super cheap dsp is made in to a data logger.

Mad Dog_2 · April 10

Haven't installed them in a few years. I'll have to look back in my pictures for the brand (High qaulity & accurate) Mad Dog

Mad Dog_2 · April 10

I have used the ONSET system..Mad Dog

Any recommendations for data loggers appreciated.

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