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ORP Control Monitor Combined with Swimming Pool Pump BL7917-2

Producer: HANNA Instruments

SKU: HANNA-BL7917-2 Category: Hanna experimental measuring equipment

– Continuously measure and control ORP from -999 to +999mV

– Integrated dosing pump from 7.8 to 13.3 liters/hour

– Large LCD screen, easy to observe

– Proportional control helps maintain precise setpoint

– 4 – 20mA output

– Suitable for use in swimming pools, electroplating, wastewater treatment.

EASY TO INSTALL

Designed with mounting holes integrated into the sturdy base, the BL7916 is easy to install. All controls and pump assembly are conveniently located on the front of the unit.

PROPORTIONAL DOSAGE

Proportional control slows the stroke rate as the measured value approaches user-selectable set points, avoiding chemical overdosing. This feature makes pump dosing more accurate, saves chemicals, and eliminates unnecessary and costly adjustments to your process, especially with slow-reacting chemicals.

STURDY CONSTRUCTION

Rugged fiber reinforced IP55 polypropylene housing protects against hazardous spills and splashes. PVDF, FPM/FKM and PTFE materials are used for all parts in contact with liquids to resist chemical corrosion.

SEPARATE OUTPUT

For enhanced troubleshooting and data logging capabilities while monitoring, simply attach a logger to the instrument's 4 to 20 mA output contacts, conveniently located on the front panel, to receive a copy of the results on demand.

SIMPLE PUMPING OPERATION

A positive displacement solenoid with few moving parts makes the BL7917 more reliable than motor driven pumps as there are no rotating parts, gears or cams; significantly reducing the possibility of mechanical failure.

AUXILIARY PUMP SWITCH

Allows the user to mount a mixer or priming pump that is only activated when the metering pump is activated.

PRESSURE/FLOW TABLE

*BAR (PSI)*	*LPH (GPH)*
0.5 (7.4)	13.3 (3.46)
1.0 (14.7)	11.7 (3.04)
2.0 (29.4)	10.1 (2.63)
3.0 (44.1)	9.0 (2.33)
4.0 (58.8)	7.88 (2.03)

SPECIFICATIONS

The scale	-999 to +999mV
Resolution	1 mV
Accuracy	±5mV @25°C/77°F
EMC deviation	±6mV
Input	10¹² Ohm
Quantitative	Linear, acid or base, user selectable
Exit	4-20 mA (isolated)
Dosing Contact	1 isolated contact, 2A, Max. 240V, resistive load, 1,000,000 strokes
Alarm Contact	1 isolated contact, 2A, Max. 240V, resistive load, 1,000,000 strokes
ORP electrode	BNC port compatible (purchase separately)
Electricity supply	BL7917-2: 230V±15%, 50/60Hz (40W)
Environment	0 to 50°C (32 to 122°F); RH max 95% does not condense
Size	W x D x H: 221 x 142 x 181 mm
Mass	5 kg
Guarantee	12 months (For products with intact tags and warranty card)
Supply includes	– BL7917 screen. – Exhaust and suction valves. – Polyethylene pump tube. – Electric cable. – User manual. – Warranty. *ORP electrode with BNC port purchased separately