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LED pH/ORP Indicator/Controller

• Compact 1/8 DIN size
• Dual set point control
• Surprisingly inexpensive
• Automatic temperature compensation

pH MINI CONTROLLER WITH 4-20mA RECORDER OUTPUT

• BL931700 is designed for easy, affordable installation in tight spaces..
• Thanks to its compact size, BL931700 can be installed right next to tanks or vats.
• This versatile controller is ideal for a wide variety of applications, such as textiles, papers, photographic solutions, plating baths, chemicals and water treatment.
• BL931700 is provided with a selectable setpoint for acid or basic dosage.  Measurements are directly acquired from a pH electrode in the range from 0 to 14 with a 0.01 pH resolution.
• Choose automatic or manual dosing mode with a switch on the front panel.
• An overtime control system advises  you when the relay is active for too long, helping to prevent overdosing.
• The BL931700 features a 4-20mA analog output for recorder connection.
• Two models are available, with different supply input at 115/230 VAC or 12 VCD.

BL 7916 BLACK STONE pH CONTROLLER & PUMP

• pH controller and dosing pump in one compact unit.
• ±0.01 pH accuracy with unbeatable performance.
• Isolated 4 to 20 mA recorder output.
• Proportional dosing slows the pump down when the measured pH level approaches the set value which ensures precise dosage and avoids costly waste of chemicals due to over-dosage.
• Alarm contact is activated whenever the pH value varies by more than 2 pH units from the setpoint.
• Auxiliary Contacts allow the user to attach a mixer or priming pump that is activated only when the pump is dosing.
• Kynar® and Teflon® materials are used for all parts that come into contact with liquid.