PH Probe Replacement for the Nutradip™ line of meters. The probe can be used with both the battery operated and ac models. Whether its for a Nutradip™ PH meter or a Nutradip™ 3 in 1 Tri-Meter™ this replacement probe will work. All new probes come with a 6 Month replacement warranty. PH Probe Replacement for the Nutradip™ Family of Meters.