The BRS Lab Grade ORP probes will last longer than most other standard grade probes with high-quality materials while giving more consistent readings in between calibrations.
 
Made in the US under strict quality control
Superior insulators with BNC style connector used for Apex and Most ORP monitors
Single Junction Probe do require being calibrated more often
Cable has a low noise design with a conductive copper layer between braid and centre conductor
Less frequent and quicker calibration
10 Ft cord
Double junction designed specifically for contact with proteins or heavy metals
Double junction High-grade platinum rod
Double junction has a Longer lifespan than single-junction