4238 pH or Redox and Temperature Analyser. Wall mounting 144x144
Measuring range: 00,00 – 14,00ph; 0.01pH resolution; accuracy: + \ - 0,2% f.s.
Redox: ± 1500mV; resolution: 1 mV; accuracy: + \ - 1 mV
Temperature: - 10,0 - + 130,0°C; resolution: 1°C; accuracy: 1% f.s.Automatic or manual temperature compensation.
 Graphic display to visualise simultaneously: measurement, temperature, analogue and digital outputs (set point) condition, alarms. Programming keypad with 5 keys.
 Function keys to direct access to the calibration menu and to the graphs of the stored measure. Internal data logger (16.000 records). Graphic stored data display with max, min and average values.  Two digital Outputs to be set for set point, with programming of  working range and activation time. Digital output for Alarm: minimum, maximum, delay of the set point, residence time (live check), malfunction. Digital output to be set for: Temperature set point  or  to control the rinsing cycle of the electrode with time and interval programming.
Digital input to be set for: external command of electrode rinsing cycle or for  dosing  inhibition
0/4÷20mA primary output with limits that can be programmed within the measurement range. 0/4÷20mA secondary output that can be programmed among: temperature/meas. repetition/PID function. PID regulation to be set for analogue or digital output (PWM or Frequency).
RS485 serial output with MODBUS RTU protocol. Possibility to simulate the outputs via a keyboard. 
Hardware technical features:
LCD STN 128x64 back-lighted graphic display. 5 keys programming keyboard.
n. 1Input for Temperature sensor PT 100 with 3 or 4 wires (std) NTC or Pt 1000
Data logger with Flash memory 4 Mbit ( 16.000 records), Type: f.i.f.o. or filling
n. 2 analogue outputs 0/4÷20mA 500Ohm galvanically isolated
n. 4 digital outputs– Dry contact Relay
n. 1 digital input - Active and already supplied
n. 1 RS 485 serial output MODBUS protocol
Power supply 100-240Vac 47÷63Hz
 ABS container for wall mounting. Mechanical protection IP66 Dim. mm. 144x144x122,5 (p) Weight Kg. 0.9