pH/ORP control is easy with the Alpha pH 200 limit controllers. Featuring 6 sub-menus accessible via a four-button keypad for quick, easy setup and calibration, the controller/transmitters also come with two levels of password to protect against unauthorised tampering.
For heightened security, use the Alpha pH 200 limit controller which only allows access to calibration and set-up menus via passwords.
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Easy push-button calibration with USA/NIST buffer recognition for fast, effortless calibration. Controller freezes data transmission and relay activities during calibration and maintenance
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Symmetrical mode of operation for clear, uninterrupted readings even in electronically noisy environments
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Two SPDT relays with independent hysteresis – effective high/low set-points limit control with minimal relay-chattering
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Choice of automatic or manual temperature compensation. Three-wire system compensates error due to cable resistance
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85 to 250 VAC. 50/60 Hz or DC variable input allows controller to be used with a wide range of supply voltages
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Full-scale 4 to 20 mA galvanically isolated current
output for process control
Applications
General: Ideal
for virtually any batch type application where
pH or ORP control or adjustment is needed.
Use as ORP monitor for ozone systems and general
purpose pH monitor for all types of water
treatment and chemical processes.
Aquaculture: Use
for pH or ORP control in fish ponds and tanks.
Industrial:
Use to treat batches of incoming process water,
rinse water treatment, recirculating system
and wastewater treatment. Suitable for pH
or ORP control of plating tanks and chemical
processing tanks. Ideal for low cost monitor
with alarms for batch and process applications.
Perfect for wastewater neutralization in small
and medium sized batches.
Specifications
Product
Specification
Description
pH
Range
0.00 to 14.00 pH
Resolution
0.01 pH
Accuracy
±0.01 pH
ORP
Range
-999 to 1000 mV
Resolution
1 mV
Accuracy
±2 mV
Temperature
Range
-10 to 110 ºC
Resolution
0.1 ºC
Accuracy
±0.5 ºC
Sensor
Pt100; 2 or 3 wire
Compensation
Auto/manual (0 to 100 ºC)
Set
Point And Controller Functions
Set point 1 (SP1)/
set point 2 (SP2)
0.00 to 14.00 pH or -999 to 1000 mV
Switching pH Hysteresis
0.00 to 2.00 pH
Switching ORP Hysteresis
0 to 300 mV
Function
Limit control
Contact Outputs
2 SPDT relays
Switching
Voltage/ Current/Power
Max. 250 VAC / max. 3 A / max. 600 VA
Electrical
Data And Connections
Transmitter Function
4 to 20 mA scalable outputs for pH/ORP, galvanically isolated