Alpha 2000D Controller & Transmitter / Analyzer Series Wide pH range of -2.00 to 16.00 pH at two-decimal accuracy :: ORP mode measures in mV or % concentration, with independent calibration modes :: Control and measure pH and ORP simultaneously with master-slave operation by placing two controllers side by side :: Wall mount, pipe mount or panel mount options. Compact design of electrode with universal 1.5” NPT mounting threads enables optimal mounting positions Alpha 2000 Controller & Transmitter / Analyzer Series Wide pH range of -2.00 to 16.00 pH at two-decimal accuracy :: ORP mode measures in mV or % concentration, with independent calibration modes :: Quick, easy push-button calibration with auto-buffer recognition. Meter displays electrode status after each calibration :: Accepts Antimony electrodes – useful in applications involving Hydrofluoric (HF) Acid :: Control and measure pH and ORP simultaneously with master-slave operation by placing two controllers side by side Alpha 1000 Controller & Transmitter Series 2-in-1 controllers/transmitters can be configured to measure either pH or OPR (mV or %) :: Auto-calibration with choice of NIST or USA buffer selection. Electrode slope and offset is displayed after each successful calibration :: Symmetrical mode option for clear, uninterrupted pH readings in electronically noisy environment :: Antimony mode option for use with antimony electrodes in applications that involves corrosive Hydrofluoric Acid :: Option of Auto or Manual Temperature Compensation. Three-wire system compensates for cable-length resistance errors :: Galvanically-isolated, scaleable 0/4 to 20 mA output for high-quality output on peripheral devices :: Alpha pH 1000 limit/proportional controller also offer two additional features: wash function for scheduled electrode wash, and alarm relay function to alert when measurement crosses the set points Alpha 800 pH/ORP Controller & Transmitter 2-in-1 controllers/transmitters can be configured to measure either pH or OPR (mV or %) :: Auto-calibration with choice of NIST or USA buffer selection. Electrode slope and offset is displayed after each successful calibration :: Symmetrical mode option for clear, uninterrupted pH readings in electronically noisy environment :: Antimony mode option for use with antimony electrodes in applications that involves corrosive Hydrofluoric Acid :: Option of Auto or Manual Temperature Compensation. Three-wire system compensates for cable-length resistance errors :: Galvanically-isolated, scaleable 0/4 to 20 mA output for high-quality output on peripheral devices Alpha 190 Controller & Transmitter Series 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 Alpha 500 2-Wire Transmitter Series Measures, displays and transmit pH/ORP with temperature simultaneously :: Symmetrical Mode option, two-wire design and input-to-output isolation give clear, uninterrupted data transmission in electrically noisy ambient :: High quality, high resolution output at chart printers and other secondary devices :: Offset Adjustment Function allows you to adjust readings conveniently without having to remove electrode from the measurement tank or pipe :: Reliable, accurate measurements at different temperature with Automatic Temperature Compensation Alpha 560 Controllers Series Separately adjustable High/Low hysteresis with user-adjustable time delay of up to 2000 seconds for minimal chattering and false alarm :: Two switching contacts as set-point relays :: Large UV Light protected LCD with backlight :: Symmetrical Mode option gives clear, accurate readings in electrically noisy ambient :: Push button operation for easy set-up programming and customization :: US and NIST auto buffer recognition for quick, easy calibration :: Reliable, accurate measurements at different temperature with Automatic Temperature Compensation Thermo Scientific Alpha pH 550 pH/ORP Monitor Measures and displays pH/ORP with temperature simultaneously :: Symmetrical Mode option gives clear, accurate readings in electrically noisy ambient :: Push button operation for easy set-up programming and customization :: US and NIST auto buffer recognition for quick, easy calibration :: Reliable, accurate measurements at different temperature with Automatic Temperature Compensation