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The Eutech Instruments αlpha pH 190 1/8 DIN pH / ORP Controller with Temperature display and Transmitter control is easy with the Alpha pH 190 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 faster and more convenient control, choose the Alpha pH 190 which allows direct access to the set-point adjustment and calibration menus.
• Easy push-button calibration with USA/NIST buffer recognition for fast, effortless calibration. Controller freezes data transmission and relay activities during calibration and maintenance
• Symmetrical mode of operation for clear, uninterrupted readings even in electronically noisy environments
• Two SPDT relays with independent hysteresis – effective high/low set-points limit control with minimal relay-chattering
• Choice of automatic or manual temperature compensation. Three-wire system compensates error due to cable resistance
• 85 to 250 VAC. 50/60 Hz or DC variable input allows controller to be used with a wide range of supply voltages
• Full-scale 4 to 20 mA galvanically isolated current output for process control

Specifications:

• 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
  • Load 200 Ohm
  • pH/ORP Input BNC (1012 impedance); asymmetrical/symmetrical
  • Connection Terminal 3-pin, 7-pin & 9-pin terminal, detachable blocks
• Display
  • LED 7 segments display
• Power Supply
  • Input 85 to 250 VAC, 50/60 Hz
  • Main Fuse 250 mA, anti-surge, S504 Bussman
• EMC Specifications
  • Emitted Interference According to EN 61326
  • Immunity To Interference According to EN 61326
• Environmental Conditions
  • Operating Temperature Range -10 to 50 ºC
  • Max. Relative Humidity 10 to 95 % (non-condensing)
• Mechanical Specifications
  • Dimensions (WxHxD) 96 x 48 x 150 mm
  • Weight 300 g (unit) / 350 g (packed)
  • Ingress Protection IP50