Product description: This instrument is to measure plant stem strength against the wind. Users only need to push the instrument against the stem to get stem strength of the plant. Features: 1. This instrument has high measuring precision and high resolution. Two model - QT-DFA01 and QT-DFA02- are available for different plants; 2. Data can be shown on a big LCD with screen rotation function; 3. The instrument can be connected to computer for trial test, data downloading, printing and analysis. Several parameters such as input speed, area can be converted to displacement and pressure, respectively; 4. The instrument is equipped with various kinds of platens for convenient measurement; 5. It is easy to use, time saving, and of high precision; 6. The instrument can show remaining battery life and it can automatically power off when battery life is low. Technical Parameters: Model: QT-DFA01 QT-DFA02 Maximum load: 50N 500N Measuring units: Kgf/lb/N Precision: +/-0.2%F.S,+/-digit Display: 4-digits LCD display Measuring value: Peak and current value, peak value can be maintained Collecting rate: 1000 times/s D/A conversion: 16-bitÎ?Σtype Processor: 8-bit CPU Working temperature: -20â?? to 40â?? Power supply: NI-MH battery or exterior AC linear power adapter or USB power supply Data output: USB Auto power shutdown: 10 minutes without operations Battery alarm: Battery icon will flicker when battery life is low. Made in china