REDOX CONTROLLER CR-421

CR-421 is a simple and accurate stationary device used for continuous redox potential and temperature measurements in clear water or sewage.
Depending of working conditions use the flow or immersible heads with appropriate type of built-in redox electrodes.
The controller is available in three versions:

equipped with two relays;
equipped with 0 ÷ 20 mA or 4 ÷ 20 mA current loop;
equipped with RS-232 output – current results may be stored in PC memory with use of delivered software

High accuracy at an affordable price.
Meter is equipped with backlit LCD display.
Periodically, the sensor should be manually cleaned.
Powered with 12 V power adapter.
Quick warranty and after-warranty repair service.

CR-421 is equipped with a hanger for mounting on a wall.
In case, when the distance between the sensor and the controller exceeds 10 m, it is necessary to use an additional preamplifier mounted in the immersible head or next to the flow head.

On special order available meter which may collect up to 8000 data sets with chosen time interval. The available values of the interval are 1, 2, 5, 10, 15, 30 and 60 minutes.
If the memory capacity is used up the oldest result is deleted and replaced with a new one. The collected or actual results may be transferred to a PC with use of the USB connector. Delivered in the set software enables the transmission of data including measured result, measured temperature, time and date. Stored results can’t be viewed on the meter’s display, except the minimal and maximal values in given time.

TECHNICAL DATA

Function	Redox	Temperature
Range	± 1999 mV	-50.0 ÷ 199.9 °C
Resolution	1 mV	0.1 °C
Accuracy (±1 digit)	±1 mV*	±0.1 °C**
Input immpedance	>10¹²Ω	-
Relay's parameters	2A/250VAC/30VDC
Memory***	8000 data sets collected with chosen time interval
Radio electric interference	N level
Power supply	12 V / 100 mA power adapter
Weight	210 g
Dimensions (mm)	L = 149, W = 82, H = 22

*	The accuracy of the meter only.
**	The accuracy of the meter only. The total error includes the meters and probe’s accuracy. In the range 0 ÷ 100 °C the acceptable error of the probe with Pt-1000B resistor: ±0.8 °C, with Pt-1000A resistor: ±0.35 °C.
***	Model with memory available on special order.