HydroACT Features	HA2	HA4	HA8
Power	100-240 VAC / 0.25 A or 12 VDC / 0.8 A (standard) or 24 VDC (optional)
Display	4.3”, 480×272, 8 bit, grayscale	4.3”, 480×272, 24 bit, color
Sensor Options	Free Cl, Total Cl, Cl Dioxide, Chlorite, Ozone, pH with Temperature, ORP SCM, UV254 organics, TSS/NTU, DO, Conductivity, Particle Counter
External Input (optional)	4-20 mA, 4-20 mA loop-powered, 0-2 VDC, 0-10 VDC, +/- 2000 mV for pH / ORP / ISEs, Pt100, pulse and Modbus
Analog Outputs (optional)	Up to 2	Up to 4	Up to 8
	Menu configurable outputs: 0-20 mA, 4-20 mA, 0-10 VDC, 0-1.25 VDC (Note: unused sensor inputs can be used as outputs)
Relays (optional)	Up to 4	Up to 8	Up to 16
	SPST, electromechanical, 380 VAC, 6 A max
Digital Inputs (optional)	Up to 4	Up to 8	Up to 16
Alarms & Thresholds	2 user-configurable alarms & thresholds with deadband and delay for each parameter and control output
Control Loops (optional)	Up to 2	Up to 4	Up to 8
Control Types (optional)	High / Low Threshold	PID (with start delay and SP ramping options), feed forward (NTU/UV), flow pacing, high/low threshold, timer
Communication (optional)	Modbus ASCII/RTU (RS485), Modbus TCP (Ethernet), PROFIBUS DP
Data & Event Logging	1,000 event / status records stored in internal memory	1 million records stored internally storage expandable with MicroSD card
Modem (optional)	None	GSM / GPRS / 3G intergrated modem
Remote Access (optional)	None	Internet browser access, alerts and reports via email (requires ethernet or modem card)
Enclosure	ABS flame retardant, NEMA 4X / IP65
Dimensions & Weight	HA2 & HA4: 9 in (230 mm) x 12.2 in (309 mm) x 4.1 in (103 mm); 4.4 lbs (2 kg) HA8: 18 in (460 mm) x 12.2 in (309 mm) x 4.1 in (103 mm); 4.4 lbs (2 kg)