型號
 HI 4521
 
pH值
 量程
 -2.0 to 20.0; -2.00 to 20.00; -2.000 to 20.000 pH
 
 
 精度/解析度
 0.1pH；0.01pH;0.001pH/±0.1 pH; ±0.01 pH; ±0.002 pH
 
 氧化還原電位
 量程/精度/解析度
 ORP ±2000 mV/0.1 mV/±0.2 mV
 
電導率
 量程
 0.000 to 9.999 μS/cm；10.00 to 99.99 μS/cm；100.0 to 999.9 μS/cm；
1.000 to 9.999 mS/cm；10.00 to 99.99 mS/cm；100.0 to 999.9 mS/cm；1000 mS/cm
 
 
 精度
 0.001 μS/cm; 0.01 μS/cm; 0.1 μS/cm; 0.001 mS/cm; 0.01 mS/cm; 0.1 mS/cm; 1 mS/cm
 
 
 解析度
  讀數(shù) ±1%(±0.01 μS/cm)
 
 電阻率
 量程
  1.00 to 99.99 Ohm?cm；100.0 to 999.9 Ohm?cm；1.000 to 9.999 kOhm?cm；
10.00 to 99.99 kOhm?cm；100.0 to 999.9 kOhm?cm；1.00 to 9.99 MOhm?cm；10.0 to 100.0 Mohm?cm
 
 
 精度
 0.01 Ohm?cm; 0.1 Ohm?cm; 0.001 kOhm?cm; 0.01 kOhm?cm; 0.1 kOhm?cm; 0.01 MOhm?cm; 0.1 MOhm?cm
 
 
 解析度
 ±2% of reading (±1 Ohm?cm)
 
總溶解固體
 量程
  0.000 to 9.999 ppm；10.00 to 99.99 ppm；100.0 to 999.9 ppm；
1.000 to