Hanna Level Controllers

HI 7871 & HI 7873 Mini Level Controllers

Controllers Hanna provides you with two models of level controllers HI 7871 and HI 7873 to choose from. These controllers are 2-wire transmitter level controllers designed especially for long distance control of liquid levels. They are suitable for many industrial applications such as level controls in tanks for biological and industrial water treatment. HI 7871 is a basic high and low level controller whereas HI 7873 has an overflow alarm as an additional feature.
Holder The holder HI 7874 is made of durable black ABS. It contains the resinated amplifier circuit and the 2-wire terminal board.
Measuring bars The measuring bars made of stainless steel are immersible in liquid. HI 7871 requires three bars, one for low level, one for high level and the third for ground sensor. HI 7873 requires four bars, the additional bar for overflow measurement. Each bar is 0.5 m long, two or more can be screwed together for added length.
A complete system requires: 1) A controller (HI 7871 or HI 7873) 2) HI 7874 (Holder) 3) HI 7875/P (A package of 5 measuring bars of 0.5m each).

Specifications:	HI 7871/115	HI 7871/220	HI 7873/115	HI 7873/220
Power	110/115V 50/60 Hz	220/240V 50/60 Hz	110/115V 50/60 Hz	220/240V 50/60 Hz
Level Adjustment	High and Low		High, Low and Over
Level Indication	High and Low		High, Low and Over
Sensor Bars (HI 7875)	Requires three		Requires four
Output Contact	One 2A/220v relay for up to 1,000,000 closures		Two 2A/220 relays for up to 1,000,000 closures
Transmission	300m maximum
Connection	11-pin connector
Environment	32 to 122°F (0 to 50°C)
Dimensions/Weight	79L x 49W x 95H mm / 4.58 oz. (130g)