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AWE Instruments

Easy to use pH Controller with 2 setpoints in Weather-Proof Enclosure. AWE Instruments Model P3647-W.

Easy to use pH controller P3647-W with 2 control relays.

The P3647-W pH Controller is only available in surface mounting configuration.

Easy to use pH Controller Introduction.

The Model P3647-W pH Controller is designed to be as easy to use as possible. The setup of the instrument including allocating the two setpoints, calibration and  ensuring the instrument is able to control a wide range of industrial processes has been designed to ensure that it is as simple as possible.

The controller itself is designed to din-rail mounting specification measuring just 105 mm wide x 100 mm high x 58 mm deep. In the surface mounting enclosure the unit measures 135 mm wide x 170 mm high and 115mm deep and we recommend allowing a further 25mm in height for access to the glands for connecting the power cable, pH electrode, and as required the metering pump, or solenoid valve.  

The P3647-W pH easy to use pH controller has a large easy to read LCD display giving good visibility to an operator of the current pH value. The controller has a clear door for easy access to the simple to use controls allowing the operator to calibrate the instrument or set the two setpoints from the front panel. 

The 2 setpoints can be adjusted using the front mounted potentiometers and allow for the on / off control relays to be set for high or low level operation.

The easy to use pH controller is able to work with any glass probes from our pH Electrode range or any other high quality pH electrode. This does exclude the use of antimony pH electrodes. The P3647-W pH controller works across the full 0.00 - 14.00 pH range. 

In addition to the pH measurement the P3647-W easy to use pH controller offers temperature compensation across the 0 - 100ºC range through a NTC10K Temperature Sensor or pH Electrode with built in temperature sensor.

P3647-W easy to use pH controller with 2 on / off control relays

The model P3647-W easy to use pH controller is fitted with two on / off  control relays each with an adjustable time delay of up to 40 seconds before the relay operates. The operation of the model P3647-W pH controllers relays maybe selected for high or low operation by two DIL switches one for each relay.

Enabling the relay functions to be either High - High, High - low or Low – Low.

When the setpoint is configured for use under low operation, then when the monitored pH value is lower than the set-point value, the LED is lit and the corresponding relay is activated. If the relay has the delay function activated then the timer will be called until the relay is activated. 

For use under high operation when the monitored pH value is higher than the setpoint, the LED is lit and the corresponding relay is activated. Again - if a delay has been assigned to the relay then the relay will wait until this delay has expired before activating the relay.

As the P3647-W is an easy to use pH controller with excellent control options it makes an excellent choice of cost effective pH controller for many industrial processes including effluent treatment and water treatment plants. 

P3647-W easy to use pH controller with 4-20mA output

The P3647-W easy to use pH controller has an industry standard 4-20mA output isolated to 500Ω. This 4-20mA output can be used with a variety of control equipment including PLC's and chart recorders. The 4-20mA output in this instrument is non-expandable meaning that the current output is not suitable for use with proportional control dosing pumps.

P3647-W Controller Specifications 

Range pH: 0.00 - 14.00 pH.

Display: 3 1/2 LCD units.

Display Size: 12.5mm 

Temp Range: Compensating 0-100ºC or 32 - 212ºF

Automatic Temp Comp: Automatic 10KΩ NTC Sensor.

Zero: ± 15%

Slope: ±15%

Resolution: 0.01 pH.

Set Points: 2 on / off over 100% of the range. SPST, 2 amp non-inductive.

Action: High Low Selectable, with delay timer 0 - 40 seconds. 

Current Output: 4 - 20 mA isolated to 500 ohms.

Power supply: 50 / 60Hz

Power Consumption: 3VA

Weight: 265 grams DIN rail version.

Dimensions: 105 x 100 x 58 mm

Ordering: Please Quote Model number P3647-W Easy to use surface mounting pH controller

P3647-W Easy to use pH Controller Data Sheet

P3647-W Data Sheet