Choosing the right controller needs to be decided based on the following criteria:
- Parameters to be measured: pH, mV, T°C, Conductivity
- Range
- Control desired: ON / OFF or proportional
- Set points: 1 or 2 for pH, 1 for other types of controllers
- Is an alarm needed
- Output signal: analog 4 to 20 mA to record or digital RS-232
HI 933700 (Two Models)
click on photo
to enlarge |
| Range |
0 to 2000 µS/cm or
0 to 4000 µS/cm |
| Control |
ON/OFF |
| Set Point |
1 |
| Alarm |
No |
| Output |
No | |
HI 943500(Four Models)
click on photo
to enlarge |
| Range |
0.0 to 199.9 mS/cm (Model A)
0.00 to 19.99 mS/cm (Model B)
0 to 1999 µS/cm (Model C)
0.0 to -199.9 µS/cm (Model D) |
| Control |
ON/OFF |
| Set Point |
1 |
| Alarm |
Yes |
| Output |
Analog | |