Any recommendations for data loggers appreciated.

JohnNY

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

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

ratio

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

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

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

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

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

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

ratio

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

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

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

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

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

I have used the ONSET system..Mad Dog