Standard or lab grade?

[tmgrash]

I cant seem to locate the difference between the standard grade ph probe and the lab grade one, othef than about $20. Both say they are accurate to within .01. Ordering an apex real soon, can anyone tell me the difference?

Thanks.

 

[RussM]

Lab-grade probes tend to respond more quickly and they last longer. They are a better value IMO.

 

[Deleted member 143833]

I agree with Russ; the lab grade probes tend to last almost 2x longer in my experience.