HANNA Instruments offers 2 models: the HI 7871 is a basic high/low controller, the HI 7873 has an extra overflow alarm.
Holder
The HI 7874 holder is water resistant (the circuits are covered with an epoxy resin).
Measuring Bars
The bars are made of stainless steel. The HI 7871 requires three bars (low, high and ground sensor), the HI 7873 requires four bars. Each bar is 0.5 metres long and can be screwed together for the desired length. The bars can also be cut to the exact length required.
click on photo
to enlarge
 |
| |
HI 7871 |
HI 7873 |
| Transmission |
300m maximum |
| Connection |
11- pin connector |
| Level Adjustement |
High and Low |
| Level Indication |
High and Low |
High, Low and Overflow |
| Measuring Bars |
| Three |
Four |
| HI 731324 (not included) | |
| Holder |
HI 7874 (not included) |
| Output Contact |
One 1A/110V relay
for up to
1 000 000 closures |
Two 2A/110V relays for up to
1 000 000 closures |
| Power Supply |
110/115V
50/60 Hz |
110/115V
50/60 Hz |
| Accessories |
HI 731324 : set of 5x 0.5 m bars
HI 7874: holder | |