Regular maintenance is essential for system longevity, reliability, and accuracy. Remember to replace motor brushes every 300-500 hours depending on your application. Replace gaskets that are worn or damaged. Inspect all electrical connections and wires. Any damaged connection or wire should be replaced immediately to avoid injury or equipment failure. It is a good practice to keep your samplers clean and free from loose debris. Unwanted dirt and debris can get deposited on the sample filter causing undesirable and inaccurate results. Please visit our store, www.store.tischinternational.com to purchase spare parts and consumable items.