No, Vernier does not have a sensor to directly test for lead in water.
A Lead Ion-Selective Electrode with a BNC connector is commercially available but can't be used with our Electrode Amplifier, order code EA-BTA, $40. The amplifier can accommodate electrode outputs from -80 mV to 300 mV. Typically Lead ISEs fall outside of this range (-100 to -240 mV).
See TIL 2291: Can I use my third-party ISE with my Vernier equipment?
Another option for testing lead uses a colorimetric method based on a lead-dithizone complex. In a weak alkaline solution, dithizone can form a stable complex with lead in a 2:1 ratio . This complex has a maximum absorbance at 520 nm. This option uses Chloroform and Potassium Cyanide. The Lead Reagent Set (Dithizone Method) can be purchased from Hach (Product Number 2243100).
The following spectrophotometers can be used. A Vernier Colorimeter can't be used with this test.
Go Direct® SpectroVis® Plus Spectrophotometer, order code GDX-SVISPL, $399 *Glass cuvettes are required.
Vernier Spectrometer, order code V-SPEC, $1,799
Vernier UV-VIS Spectrophotometer, order code VSP-UV, $2,100
Vernier Fluorescence/UV-VIS Spectrophotometer, order code VSP-FUV, $2,899
LaMotte also has a Lead Screening Test Kit for Drinking Water (Order Code 5-0140) that detects lead levels above 15 ppb which is the EPA action level.