pH Controllers at a glance

Product	Control type	Display	Housing	Measures	Number of set points	Separate alarm relay
pH 200 Controller	on/off	scrolling 14-segment LED, four digit	1/8 DIN	pH, mV, °C	two (high and low)	no
pH 800 Controller	on/off	dual line LCD, 4-digit upper and 3 1/2 digit lower	1/4 DIN	pH, mV, °C	two (high and low)	no
pH 1000 Controller	on/off or proportional (selectable)	dual line LCD, 4-digit upper and 3 1/2 digit lower	1/4 DIN	pH, mV, °C	two (high and low)	yes