CONTROL OUTPUTS
1 = Two powered, three dry contact relays
2 = Two proportional relays, three dry contact relays
VOLTAGE
1 = 120 VAC, prewired, 6” pigtails (WPH410) or 10 ft.
cables (WPH420 only)
3 = 120 VAC, prewired, 10 ft. cables with connectors
for EW
pumps
5 = Hardwired, cable glands
OUTPUT
N = No data output
4 = Isolated 4-20 mA output
2 = Two isolated 4-20 mA outputs
OPTIONS
1 = Prewired preamp with 10 ft. cable (electrode not
included. Electrode should have BNC connector)
2 = Submersion flat pH electrode w/integral preamp
(WEL-PHF-21)
3 = In-line flat pH electrode w/integral preamp (WEL-PHF-22)
includes 3/4” NPTF mounting tee
4 = In-line flat pH electrode w/integral preamp (WEL-PHF-22)
includes 3/4” flow switch manifold & ‘U’ adapter mounted on
polypro panel
4T=In-line flat pH electrode with ATC and integral preamp
(WEL-PHF-12), 3/4” flow switch manifold & ‘U’ adapter
mounted on polypro panel
5= Submersion ORP electrode w/integral preamp
(WEL-MVF-21)
6 = In-line ORP electrode w/integral preamp (WEL-MVF-22),
includes 3/4” NPTF mounting tee
6R= In-line rod style ORP electrode w/integral preamp
(WEL-MVR-22), includes 3/4” NPTF mounting tee
7 = In-line ORP electrode w/integral preamp (WEL-MVF-22),
3/4” flow switch manifold and ‘U’ adapter mounted
on polypro panel
7R= In-line rod style ORP electrode w / integral preamp
(WEL-MVR-22), 3/4” flow switch manifold and ‘U’
adapter mounted on polypro panel
USB FEATURES
N = Software upgrade capability only
U = Integrated datalogging, event/reset logging, and
configuration file import/export
ORDER INFORMATION
ABOUT US
Walchem integrates its advanced sensing, instrumentation, fluid
pumping and communications technologies to deliver reliable and
innovative solutions to the global water treatment market
Our in-house engineering is driven by quality, technology and
innovation. For more information on the entire Walchem
product line, visit: www.walchem.com
Walchem, An Iwaki America Incorporated Company
Five Boynton Road Hopping Brook Park
Holliston, MA 01746 USA
Phone: 508-429-1110
Fax: 508-429-7433
www.walchem.com
WPH4 0
voltage output options USB
Webmaster®ONE
WebMasterONE is the most advanced online cooling tower and
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multi-I/O platform allows you to control multiple cooling towers,
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An extensive assortment of integrated communications and
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professional to provide more effective water management
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180372.A2 Jun 2009
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