อุปกรณ์วัด pH (pH Mini Controller)

BL 981411

pH Mini Controller

The BL 981411 pH controller has been designed for easy, affordable installation in tight spaces, ideal for simple and effective process control. The unit is provided with high impedance pH input and can be used with any pH electrode with standard BNC connector. Measurements are clearly displayed on the LCD, while the status LED indicates operating mode.

BL 981411 is also provided with a dosing relay. Selecting acid dosing, will cause the relay to activate when the measurement is higher than the set point. If the basic dosing is selected, the relay is activated when the reading falls below the set point.

Set point adjustment (from 0 to 14 pH) and calibration procedures are easily performed with trimmers on the front panel. Users can choose from automatic or manual dosing modes with a switch on the front panel. Manual control is particularly useful during maintenance operations, because it permits operators to enable or disable the dosing relay according to need. An overtime control system advises users when the relay is active too long, to help prevent overdosing.

Specifications

Range  0.0 to 14.0 pH
Resolution  0.1 pH
Accuracy @ 25°C  ±0.1 pH
Calibration  manual, with offset trimmer
Dosing Relay  max 2A (fuse protected), 250 Vac, 30 Vdc
Dosing Selection  acid or alkaline
contact open=acid dosage=relay ON if measurement > set point contact close=alkaline dosage=relay ON if measurement < set point
Setpoint  adjustable from 0.0 to 14.0 pH
Overtime  adjustable, typically from 5 to approx. 30 minutes
Input Impedance  102 Ohm
Power Supply  See Chart
Dimensions  79 x 49 x 95 mm (3.1 x 1.9 x 3.7’’)
Weight  See Chart

Accessories

Solutions
HI 7004L  4.01 pH Buffer Solution
1 x 500 mL bottle
HI 7007L  7.01 pH Buffer Solution
1 x 500 mL bottle
HI 7010L  10.01 pH Buffer Solution
1 x 500 mL bottle
HI 70300L  Electrode Storage Solution
1 x 500 mL bottle
HI 7061L  General Purpose Cleaning Solution
1 x 500 mL bottle
Accessories
HI 740146  Mounting Brackets for BL 931700 Housing
HI 710005  Power Adapter, 115 Vac to 12 VDC, US Plug
HI 710006  Power Adapter, 230 Vac to 12 VDC, European Plug
Probes
HI 1001  Flow-thru Monitoring pH Electrode with BNC Connection and 3 m Cable