Hardy Diagnostics LokTight™ Tryptic Soy Agar (TSA) with Lecithin and Tween® 80, USP is a ready-to-use contact plate designed for surface monitoring in cleanrooms and controlled environments.
Formulated with Tryptic Soy Agar enriched with Lecithin and Tween® 80, this medium neutralizes residual disinfectants — ensuring accurate recovery of viable microorganisms from sanitized surfaces.

The innovative LokTight™ friction-fit locking lid prevents accidental opening and contamination during sampling and transport, making it ideal for pharmaceutical manufacturing, biotechnology, cannabis QA testing, and aseptic processing areas.

Each contact plate includes a grid-molded base to facilitate accurate colony enumeration, and each lot is supplied with a Certificate of Analysis to meet USP and GMP documentation requirements.

Features and Benefits:
• Neutralizing formulation — Lecithin and Tween® 80 neutralize disinfectant residues for accurate microbial recovery
• LokTight™ lid system — twist-lock design prevents accidental opening during handling or transport
• Contact plate (Rodac™) design — convex agar surface for direct surface contact monitoring
• Molded counting grid — simplifies colony enumeration and documentation
• Friction lid stability — maintains lid placement before and after sampling
• USP-compliant — supports validation and regulatory monitoring programs
• Certificate of Analysis available for every lot

How to Use (3 Steps):
1️⃣ Remove lid.
2️⃣ Gently press plate to surface — avoid twisting or sliding.
3️⃣ Replace and twist lid until frosted bands align and lock.