• 0?199.9 µS / 200?1999 µS (0.1 µS/1 µS resolution)

 • Ideal for testing purified drinking water or research grade lab measurements

 • Auto-Ranging feature quickly switches you to the highest resolution and correct meter range

 • Automatic temperature compensation stainless steel sensing element gives you fast accurate readings even in fluctuating temperatures

 • Two-point push-button calibration calibrate at one point for each range; no screwdrivers necessary

 • Hold function freezes reading until you can log it

The TDSTestr 40 features microprocessor-based, all push-button operation. All functions are accessible from a splash-resistant membrane keypad. Each tester features a sturdy pocket clip with holes to attach a cord. Their thermoplastic body and stainless steel electrodes offer good chemical compatibility and durability