This item is well made for practical use. It features good waterproof and anti-rust performance. With a professional design, it is a reliable choice for waterproof temperature sensing. Features - Color: Black - Material: Polymer - Length: 100cm / 39.4 inch - Nominal resistance at 25°C (commonly used): 1.5K, 2K, 5K, 30K, 47K, 100K, 200K, 230K, 500K, 1M, 1.2M - Resistance accuracy: ±1%, ±2%, ±3% - B-value (25/50°C, commonly used): 3380K, 3435K, 3470K, 3600K, 3899K, 3935K, 3990K, 4000K, 4100K, 4200K, etc. - Temperature measurement accuracy: ±1% - Operating temperature range: -40°C to +300°C (suitable for high and low temperature applications; sensor chip and manufacturing process may vary) - Dissipation power factor: ≥5 mW/°C - Maximum rated power: 45mW - Thermal time constant: ≤3 seconds - Resistance temperature coefficient: -2% to -5% per °C - Insulation performance: 500V test, insulation resistance ≥100MΩ - Dielectric strength: 1500V, 5 seconds, 0.5mA, no breakdown - Wide measurement range - Waterproof and anti-rust design Package List: 1 x Set of 5PCS 1M Waterproof Temperature Sensors (NTC Thermistor Probe, Digital Temperature Transducer with Extension Cable)