pH or ORP CONTROLLER and PUMP
PHP-700 Series
U pH or ORP Controller and Dosing
Pump in One Compact Unit
U ±0.01 pH /± 5mV Accuracy with
Unbeatable Performance
U Isolated 4 to 20 mA
Recorder Output
U Proportional Dosing Slows the
Pump Down When the Measured
pH or ORP Level Approaches
the Set Value—Ensuring Precise
Dosage and Avoids Costly Waste
of Chemicals Due to Overdosage
U Alarm Contact Activated When pH
or ORP Value Varies by More than
2 pH or 200 mV Units from
the Setpoint
U Auxiliary Contacts Allow User to
Attach a Mixer or Priming Pump
that is Activated only When the
Pump is Dosing
U PVDF, FKM and PTFE Materials
Are Used for All Parts that Come
into Contact with Liquid
Two Advanced Instruments in One
The PHP-700 Series pumps combine the
powerful PHP-600 series dosing pumps
with the state-of-the-art controllers. These
unique products were developed for
measuring and controlling pH or ORP and
the regulated dosing of various chemicals.
The latest innovation eliminates the need
for multiple instruments by combining two
instruments into one. No more complicated
installations, wiring, and compatibility
problems. This compact system features
accurate regulation, proportional dosing,
alarm and recorder signals and much more
all in one unit.
Easy Installation
Designed with mounting holes in the
rugged base, the PHP-700 Series pump/
controllers are simple to install. There is
no need for any additional hardware. All
of the controls and pump assemblies are
conveniently located on the front of the
unit. If the operator must access the pump
head or control panel for any reason, there
is no need to dismount the unit.
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Our Industrial pH Instrumentation and Electrodes product
line continues to expand, visit omega.com for new details!
PHP-701 and PHE-1411,
electrode (sold separately)
shown smaller than actual size.
Visit omega.com/phe1300_1400_2300
for details.
Rugged Construction
The PHP-700 Series pump/controllers
are housed in rugged, fiber-reinforced
polypropylene casings. They are IP65
rated, preventing ingress of liquids.
The material used for the housing
resists corrosion caused by most
chemicals, protecting the unit from
hazardous spills and splashes.
Superior Materials
The PHP-700 Series pumps use
PVDF, FKM and PTFE materials for
all components in contact with the
chemicals being dosed. These materials
have properties that enable them to
resist even the most corrosive chemicals
in the industry. The choice of material
makes the pump more versatile,
allowing it to be used to handle a wider
variety of reagents.
For Sales
& Service
Simple Pump Action
A positive displacement solenoid with
few moving parts makes PHP-700
Series pumps more reliable than motor
driven pumps. With no rotating parts,
gears or cams, part wear and oiling
associated with motor driven pumps
is eliminated, drastically reducing any
chance of mechanical failure.
U.S.A. and Canada
Proportional Dosing
The PHP-700 Series controller/ pump
strokes at full capacity when the
measured value deviates by more than
1.5 pH or 150 mV from the set value.
A proportional control slows down the
stroke rate as the measured value
approaches the user-selectable value,
avoiding over-dosage of chemicals.
This feature makes the pump’s dosing
more accurate, saves chemicals
and eliminates unnecessary and
costly corrections of your processes,
especially with slow reacting chemicals.
Isolated Recorder Output
To enhance troubleshooting and provide
the user with the ability to record data
while monitoring, the PHP-700 Series
controller/pumps provide for a recorder
output. By simply attaching a recorder
to the instrument’s 4 to 20 mA output
contacts, conveniently located on the
front panel, you can obtain a hard copy
of the results on demand.
Alarm Output
When monitoring and controlling pH
and ORP levels in a process, it is very
important that any potential problem
will not go unattended. The units
incorporate an alarm system that will
alert the user if the reaction is not within
certain guidelines.
The alarm of the PHP-700 Series will
be activated if the measured pH value
is 2 pH units lower than the setpoint (if
dosing acid, this indicates overdosage,
a common symptom of siphoning). The
alarm will also activate if the value is
2 pH higher than the setpoint (if dosing
acid, this is an indication of insufficient
dosage, a common symptom of the lack
of reagent). The alarm will activate if
the mV value is 200 mV lower than the
setpoint (if dosing reducing chemicals,
this indicates overdosage). The alarm
will also activate if the value is
200 mV higher than the setpoint
(if dosing reducing chemicals, this is
an indication of lack of reagent).
Auxiliary Dosing Contacts
The auxiliary dosing contacts of the
units are closed whenever the pump is
dosing. This solution offers considerable
advantages, especially for small plants,
where these pumps need to be
the only equipment left running. This
will spare other equipment such as
mixers, priming pumps etc. With this
feature activated, a mixer can be
automatically started, when the
pump is dosing.
Specifications
Power Supply:
110/115 V 50/60 Hz ±15% (40W)
220/240 V 50/60 Hz ±15% (40W)
(optional)
Range: 0.00 to 14.00 pH;
0 to ±999 mV
Resolution: 0.01 pH; 1 mV
Accuracy: ±0.01 pH; ±5 mV
Input: High impedance
1012 Ω BNC connector
Dosage: Proportional; acid or base;
oxidizing or reducing; user selectable
Dosing Contact: Isolated, 2A,
max 240V, resistive load,
1,000,000 strokes
Alarm Contact: Isolated, 2A,
max 240V, resistive load,
1,000,000 strokes
Calibration:
Offset: ±1 pH by offset trimmer
Slope: 85 to 115% by slope trimmer
Recorder Output: 4 to 20 mA, isolated
Environment: 0 to 50°C (32 to 122°F)
Dimensions: 181 L x 221 W x 142 mm H
(7.1 x 8.7 x 5.6")
Weight: 5 kg (Approx. 11 lb)
To Order Visit omega.com/php700 for Pricing and Details
Model No. Description
PHP-701 pH controller and metering pump
PHP-702 ORP controller and metering pump
Maximum Capacity
Pressure Flow
PSI BAR GPH LPH
14.5 1.0 3.1 11.7
29.0 2.0 2.7 10.1
58.0 4.0 2.1 7.8
Accessories
Model No. Description
PHP-600-PHK PVDF pumphead, PTFE coated O-ring and 6 screws and washers
PHP-600-DVA Spare discharge valve assembly, complete with a FKM O-ring, glass valve ball, the valve spacer and seat,
head nipple and the tube nut to secure the assembled parts
PHP-600-SVA Spare suction valve assembly, complete with a FKM O-ring, glass valve ball, the valve spacer and seat,
head nipple and the tube nut to secure the assembled parts
PHP-600-IVA Injection valve assembly, complete with and injection nipple, PTFE coated spring, glass valve ball and a
valve assembly
PHP-600-FVA Foot valve assembly contains a filter with a filter holder, and a valve assembly
PHP-600-CW Ceramic weight, 4 each
Comes complete with discharge and suction valves and operator’s manual.
Add suffix “-220VAC” to model number for 220/240V operation, no additional charge.
Ordering Examples: PHP-701, controller and chemical metering pump, PHE-7351-15, pH electrode, PHA-4, 4.00 pH buffer, PHA-7, 7.00 pH buffer.
PHP-702, ORP controller and metering pump, and ORE-6510, ORP submersible electrode.
PHE-7351-15 Industrial electrode for in-line or submersion
PHA-4 4.00 pH buffer solution 500 mL (1 pint) bottle
PHA-7 7.00 pH buffer solution 500 mL (1 pint) bottle
PHA-10 10.00 pH buffer solution 500 mL (1 pint) bottle
ORE-6510 ORP submersible electrode
PHEH-65-10 Required mounting assembly for ORE-6510
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pH Instrumentation and Electrode products online,
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visit omega.com