HI9811-51是一款便携式防水仪表，设计用于与HI1285-51 pH/EC/TDS/温度多参数探头配对。该仪表易于使用，带有LCD上清晰显示的测量模式专用键，以及pH值和EC的1点校准旋钮。屏幕上的教程信息指导用户完成校准和测量。
带pH、EC/TDS和温度传感器的三合一组合探头
最适合农业、温室和水培应用
HI9811-51是一款用于农业、温室和水培应用的pH/EC/TDS测量仪。
这些仪表配有一个大液晶显示器，显示pH、EC、TDS或温度读数以及教程说明。pH读数以0.1分辨率和+/-0.1 pH的精度显示，而EC和TDS读数以10 mS/cm和10 ppm（mg/L）分辨率和2%满量程精度显示。温度校正系数（β）固定在2%/°C，允许对EC和TDS进行自动温度补偿测量。这些仪表使用两个微调器手动校准到一个点。pH值校准为pH 7.01，而EC/TDS校准为1.41 mS/cm（1413µS/cm）或1382 ppm。LCD屏幕上有电池寿命指示器以及屏幕上的教程消息。
在pH、电导率和TDS之间切换测量参数时，不需要更换探头。这些多参数仪表减少了日常水质分析所需的仪器数量。
所有型号的探头均配备聚丙烯主体、放大pH电极，内置EC/TDS和温度传感器。pH电极的放大器可防止来自湿度和来自电机、镇流器或泵等常见来源的电噪声的干扰。
| Specification Name | Detail |
|---|---|
| sku | HI9811-51 |
| pH Range | 0.0 to 14.0 pH |
| pH Resolution | 0.1 pH |
| pH Accuracy @ 25°C / 77°F | ±0.1 pH |
| pH Calibration | manual, 1-point through offset trimmer |
| Temperature Range | 0.0 to 70.0 °C |
| Temperature Resolution | 0.1°C |
| Temperature Accuracy @ 25°C / 77°F | ±0.5°C |
| Temperature Calibration | Automatic, from 0 to 70°C with ß=2% / °C |
| EC Range | 0 to 6000 µS/cm |
| EC Resolution | 10 µS/cm |
| EC Accuracy @25°C/77°F | ±2% F.S. |
| EC Calibration | manual, 1-point through slope trimmer |
| TDS Range | 0 to 3000 ppm (mg/L) |
| TDS Resolution | 10 ppm (mg/L) |
| TDS Accuracy @ 25°C / 77°F | ±2% F.S. |
| TDS Conversion Factor | 0.5 ppm (mg/L) = 1 µS/cm |
| TDS Calibration | manual, 1-point through slope trimmer |
| Power Supply | 9V / approximately 450 hours of continuous use |
| Environment | 0 to 50°C (32 to 122°F); RH max 100% |
| Dimensions | 145 x 80 x 36 mm (5.7 x 3.1 x 1.4”) |
| Weight | 230 g (8.1 oz.) |
| Ordering Information | HI9811-51 is supplied with HI1285-51 multiparameter probe, HI70007 pH 7.01 calibration solution sachet, HI70032 1382 ppm (mg/L) calibration solution sachet, HI70031 1413 µS/cm calibration solution sachet, HI700661 electrode cleaning solution sachets (2), 9v battery (1), instructions and rugged carrying case. |
| Warranty | 2 years |
| Recommended Probe | HI1285-51 polypropylene body, pre-amplified multiparameter probe with internal temperature sensor, 8-pin DIN connector and 1 m (3.3’) cable |