Cooling Tower Controller Model 350 pH from Lakewood Instruments

Product Information

The Model 350 allows you to control acid and/or caustic feed in order to maintain desired pH levels in your cooling tower. This model features an alarm timer which prevents excessive chemical feed and a flowswitch which prevents chemical feed if there is no sample flow. For cooling tower applications only. Includes plumbing.

Specifications

Inputs
Power	120 VAC 120/240 VAC w/-WP
Sensor	pH Combination glass electrode in PVC housing
Flow switch	Dry contact
Outputs
Relays	3 Amps @ 120 VAC
0-1 mA	non isolated
4-20 mA	isolated, internal power w/-35
Plumbing
Pressure	140 psi (9.7 bar) 100°F (38°C)
Max. Temperature	140°F (60°C)
Min. Flow	1 gpm (3.8 Lpm)
Controller
pH Range	5-10 pH
Accuracy	±0.05 pH
Resolution	0.01 pH
Deadband	Adjustable
Setpoints	HIGH and LOW
Alarm Timer 5-90 minutes.	Locks out both HIGH and LOW setpoints.
Ambient Temperature	32-158°F (0-70°C)
Electrical Rating	UL Listed
Enclosure	ABS Plastic
	NEMA 4X Optional

Ordering Information

350		pH controller for acid and caustic feed that has dual setpoints, 5-10 pH scale, a feed limit timer with push button reset, flowswitch, sensor, power cord, outlets and a digital display. UL Listed.
CONTROLLER OPTIONS (optional)
-CRPH		Custom setpoint dial; 0-14 pH
REMOTE SENSOR OPTIONS (optional)
-RPFS		Unlimited distance. Preamp, sensor, flowswitch and sensor tee. Cable must be provided by customer
ENCLOSURE OPTIONS (optional)
-WP		Watertight enclosure with 120/240VAC 50/60 Hz power switch. ½ inch conduit knockouts. No outlets or power cord.
PLUG-IN OUTPUT OPTIONS (optional, select one only)
-35		Isolated 4-20 mA output for remote data acquisition.
-39F		Frequency output contact for electronically pulsed chemical pump.
-39P		Percent on-time modulating contact for solenoid chemical feed systems.
-42		HIGH/LOW alarm contacts with adjustable setpoints.
-44		Isolated 4-20 mA output plus High and Low alarms.