T-CAL® turbidity standards are stable Formazin standards prepared in ready-to-use concentrations to ensure accurate turbidity measurements. All concentrations are verified to meet tight quality control specifications, are EPA & ISO compliant for reporting purposes and are guaranteed to save you time. The standards are supplied in sealed vials, eliminating any need for preparation.

• Stabilised Formazin turbidity standard in ready-to-use sealed vials
• Save time and eliminate errors - no need for dilution
• US EPA and ISO approved as primary calibration standards
• WAT2252 includes all concentrations needed to calibrate and verify the TB 350 WL Portable Turbidimeter (5, 20, 800, 2000, 4000 NTU)
• WAT2254 includes all concentrations needed to calibrate and verify the TB 350 IR Portable Turbidimeter (5, 20, 800, 4000 NTU)
• WAT2256 includes all concentrations needed to calibrate and verify the TB 211 IR and TB 300 IR Turbidimeter (0,1, 20, 200, 800 NTU)