量程:溶解氧：0.0 to 50.0 mg/L；0 to 600 %； 温度：-5.0 
to 50.0°C,精度:溶解氧:读数的±1%；温度:±0.2°C

量程:溶解氧：0.0 to 50.0 mg/L；0 to 600 %； 温度：-5.0 
to 50.0°C,精度:溶解氧:读数的±1%；温度:±0.2°C

量程:溶解氧：0.0 to 50.0 mg/L；0 to 600 %； 温度：-5.0 
to 50.0°C,精度:溶解氧:读数的±1%；温度:±0.2°C

量程:溶解氧：0.00 to 45.00 mg/L；0.0 to 300.0 %； 温度：0.0 to
50.0°C, 精度:溶解氧：±1.5% F.S.；温度： ±0.5°C

量程:溶解氧：0.00 to 45.00 mg/L；0.0 to 300.0 %； 温度：0.0 to
50.0°C, 精度:溶解氧：±1.5% F.S.；温度： ±0.5°C

测量范围:0 to199.9 µS/cm；0 to 1999 µS/cm；0 to
19.99 mS/cm；0 to 199.9 mS/cm；0 to 19.90 MΩ•cm

量程:0.00 to 29.99 µS/cm; 30.0 to 299.9 µS/cm;
300 to2999 µS/cm; 

测量范围:EC;0 to199.9 μS/cm；0 to 1999 μS/cm；
0 to19.99mS/cm；0 to 199.9 mS/cm；
电阻率:0 to 19.90 MΩ•cm

测量范围: 0.0 to 199.9 mg/L (ppm)；0 to 1999 mg/L 
(ppm)；0.00 to 19.99 g/L (ppt),精度: ±1% F.S.

量程:EC; 0 to 3999 µS/cm,TDS:0 to 2000 ppm（mg/L）
温度:0.0 to 60.0°C / 32.0 to 140.0°F