lab probes identification

[benf]

How can i tell by looking at the probe(ph and orp) they are lab vs standard?

[clp]

The lab grade probes are 5.85" long, and the standard probes are 5.0" long.

Curt

[AcroSteve]

Typical life span of one verses the other?

[clp]

Lab grade probes typically last 6+ months longer. Typical lifetimes are: standard grade 12 to 18 months, lab grade 18 to 24 months.

Curt