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Conductivity, pH/ORP & Disinfection
W100P Series Controllers
The W100P series provide an economical and reliable
way to keep your water treatment program under control.
Summary of Key Benets
Large display with icon based programming makes setup easy
Compact ¼ DIN panel mount enclosure
Universal sensor input provides extraordinary exibility; the same controller can be used with almost
any type of sensor needed; conductivity (contacting and electrodeless), amplified pH/ORP/ISE, or
disinfection
Two pH/ORP/ISE models available for use with non-amplied electrodes with or without a BNC connector
Multiple language support allows simple setup no matter where your business takes you
Four control outputs allow the controller to be used in more places than other entry level models
Complete flexibility in the function of each relay
• On/Off Setpoint
• Time Proportional Control
• Pulse Proportional Control (when purchased with 4-20mA or pulse solid state opto outputs)
• In-range or Out-of-range activation
• Timer-based activation
• Activation based upon the state of a contact closure
• Timed activation triggered by a Water Contactor or Paddlewheel flow meter’s
accumulated total flow
• Activate with another output
• Alarm
• PID Control (when purchased with 4-20mA or pulse solid state opto outputs)
Typical Applications
• Wastewater neutralization & disinfection
• Food and Beverage disinfection
• Potable water treatment
• Swimming pools & spas
• Cooling tower biocide control
• Metal finishing & printed circuit board
• Irrigation & fertigation
• RO Systems
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Specifications
Measurement Performance
Range Resolution Accuracy
0.01 Cell Contacting Conductivity 0-300 µS/cm 0.01 µS/cm, 0.0001 mS/cm, 0.001 mS/m, 0.0001 S/m, 0.01 ppm ± 1% of reading
0.1 Cell Contacting Conductivity 0-3,000 µS/cm 0.1 µS/cm, 0.0001 mS/cm, 0.01 mS/m, 0.0001 S/m, 0.1 ppm ± 1% of reading
1.0 Cell Contacting Conductivity 0-30,000 µS/cm 1 µS/cm, 0.001 mS/cm, 0.1 mS/m, 0.0001 S/m, 1 ppm ± 1% of reading
10.0 Cell Contacting Conductivity 0-300,000 µS/cm 10 µS/cm, 0.01 mS/cm, 1 mS/m, 0.001 S/m, 10 ppm ± 1% of reading
pH -2 to 16 pH units 0.01 pH units ± 0.01% of reading
ORP/Ion Selective Electrode -1500 to 1500 mV 0.1 mV ± 1 mV
Disinfection sensors -2000 to 1500 mV 0.1 mV ± 1 mV
0 - 2 ppm to 0 - 20,000 ppm Varies with range and slope Varies with range and slope
Electrodeless Conductivity 500 - 12,000 µS/cm 1 µS/cm, 0.01 mS/cm, 0.1 mS/m, 0.001 S/m, 1 ppm ± 1% of reading
3,000-40,000 µS/cm 1 µS/cm, 0.01 mS/cm, 0.1 mS/m, 0.001 S/m, 1 ppm ± 1% of reading
10,000-150,000 µS/cm 10 µS/cm, 0.1 mS/cm, 1 mS/m, 0.01 S/m, 10 ppm ± 1% of reading
50,000-500,000 µS/cm 10 µS/cm, 0.1 mS/cm, 1 mS/m, 0.01 S/m, 10 ppm ± 1% of reading
200,000-2,000,000 µS/cm 100 µS/cm, 0.1 mS/cm, 1 mS/m, 0.1 S/m, 100 ppm ± 1% of reading
Temperature 23 to 500°F (-5 to 260°C) 0.1°F (0.1°C) ± 1% of reading within range
Temperature °C
Range Multiplier %
0 10 15 20 25 30 35 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180
181.3 139.9 124.2 111.1 100.0 90.6 82.5 75.5 64.3 55.6 48.9 43.5 39.2 35.7 32.8 30.4 28.5 26.9 25.5 24.4 23.6 22.9
Note: Conductivity ranges above apply at 25°C. At higher temperatures, the range is reduced per the range multiplier chart.
Inputs
Power
100-240 VAC, 50 or 60 Hz, 12 VA
Digital Input Signals (1)
State-Type
Electrical: Optically-isolated input.
Typical response time: <2 seconds
Devices supported: Any isolated dry contact (i.e. relay,
Types: Interlock
Low Speed Counter-Type
Electrical: Optically-isolated input.
Devices supported: Any device with isolated open drain,
Types: Contacting Flowmeter
High-Speed Counter-Type
Electrical:
Devices supported: Any device with isolated open drain,
Types: Paddlewheel Flowmeter
Provides isolated 9V power.
Current consumption when input is
closed: 2.3 mA nominal.
reed switch)
Provides isolated 9V power.
Current consumption when input is
closed: 2.3 mA nominal.
0-10Hz, 50 msec minimum pulse width
open collector, transistor or reed switch
Optically-isolated input.
Provides isolated 9V power.
Current consumption when input is
closed: 2.3 mA nominal.
0-500Hz, 1.00 msec minimum pulse width
open collector, transistor or reed switch
Outputs
Dry contact mechanical relays (2 or 4 depending on
model code
6 A (resistive), 1/8 HP (93W) per relay
Dry contact relays are not fuse protected.
Pulse Outputs (0 or 2 model code dependent)
Opto-isolated, solid-state relay, 200mA, 40V DC
VLOWMAX = 0.05V @ 18mA
4 - 20 mA (1)
Internally powered, Fully isolated
600 Ohm max resistive load, Resolution 0.0015% of span
Accuracy ± 0.5% of reading
Mechanical (Controller)
Enclosure Polycarbonate 1/4 DIN
Enclosure Rating NEMA 4X (IP65)
Display 128 x 64 graphic backlit display
Ambient. Temperature -4 to 131°F (-20 to 55°C)
Shipping Temperature -4 to 176°F (-20 to 80°C)
Shipping weight 15.7 lbs (7.1 kg) (approximately)
varies with model
Agency Certifications
Safety: UL 61010-1:2012, 3rd Edition
CSA C22.2 No.61010-1:2012, 3rd Edition
IEC 61010-1:2010 3rd Edition
EN 61010-1:2010 3rd Edition
EMC: IEC 61326-1:2012
EN 61326-1:2013
Note: For EN61000-4-6, EN61000-4-3 the controller met performance criteria B. This equipment is suitable for use in establishments
other than domestic and those directly connected to a low voltage
(100-240 VAC) power supply network which supplies buildings used for
domestic purposes.
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Specifications
Dimensions
98 mm
3.86 in
98 mm
3.86 in
99.36 mm
3.91 in
88 mm
3.46 in
10 mm
0.39 in
Panel Cutout
3.62 x 3.62”
+0.03, -0.00
(92 x 92mm)
+0.76, -0.00
108.5 mm
4.27 in
Panel Cutout
3.62 x 3.62”
+0.03, -0.00
(92 x 92mm)
+0.76, -0.00
minimum
clearance
1”
(25mm)
Panel Cutout
3.62 x 3.62”
+0.03, -0.00
(92 x 92mm)
+0.76, -0.00
Panel Cutout
3.62 x 3.62”
+0.03, -0.00
(92 x 92mm)
+0.76, -0.00
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Ordering
Information
WCNP (Conductivity, Amplified pH or ORP, Disinfection
WPHBP (Non-PreAmplified pH/ORP/ISE with BNC)
WPHNP (Non-PreAmplified pH/ORP/ISE without BNC)
Relays/Wiring
110 = 4 dry relays
120 = 2 pulse, 2 dry relay
Analog Output
A = One isolated analog (4-20 ma) output
Sensors
N = No sensor
Relays/Wiring SensorsAnalog Output
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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
180624.F September 2018
Walchem, Iwaki America Inc. | Five Boynton Road Hopping Brook Park | Holliston, MA 01746 USA | Phone: 508-429-1110 www.walchem.com
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