AquaMetrix P65C, R65C Data sheet

Water Analytics

Aqua

Description

by

Water Analytics

Aqua

Metrix

AquaMetrix pH and ORP differential
probes stay in service and provide accu­rate measurements under conditions that
often render conventional pH probes in­operable. Now for added versatility, these
probes, eld-proven in hundreds of instal­lations, are available with an integral en­capsulated 4-20 mA two-wire transmitter
to feed directly to a PLC or a DCS.

The P65 pH and R65 ORP probes em­ploy a differential measurement tech­nique. Unlike conventional combination
probes, the differential probe has two
high impedance measurement circuits
containing a common metallic return
electrode. One circuit includes the pro­cess measurement electrode which gen­erates a potential E1 proportional to the
process pH. The second circuit includes
an internal measurement electrode im­mersed in a stable buffer solution which
generates a standard reference potential,
E2. Both circuitshave a common potential
E3 developed at the return electrode. The
two circuits are fed into ampliers which
provide an output representing the differ­ential between them:

(E1 - E 3) - (E2 - E3). The common po­tential E3 is cancelled out electronically,
greatly reducing inaccuracies caused by
ground loops which may exist between
process and instrument grounds. Ground
loop current willow through the low im­pedance path of the return electrode, af­fecting the potential E3, but not the dif­ferential measurement.

Aquametrix Model P65C/R65C

Probes with 4 to 20 mA Output

The differential probe maintains its accu­racy and stability in aggressive process
applications long after a combination­style probe’s performance begins to de­teriorate.

Maintenance costs are reduced and the
life of the probe is increased. The internal
reference electrode is electrically con­nected to the process solution by means
of a eld-replaceable double junction salt
bridge which greatly reduces the possibil­ity of contamination of the buffer solution
in the reference circuit. Although seldom
required, the reference solution may be
easily replaced by removing the screw­out salt bridge. A salt bridge and buffer kit
is available for this purpose.

Another advantage of the 65 series is the
semi-ush face which is easily cleaned
and avoids solution materials gather­ing on protrusions found in competitive
probes. The domed glass electrode, the
protective metal electrode and the tem­perature sensor protrude only about 1/8
inch while the salt bridge is ush. A at­face version of the pH probe is also avail­able.

The 65 series can be provided in any of
the physical congurations in the P60/
R60 series differential probes: 65C-8
with 1-1/2” threaded body style, 65C-6
“Easy-In, Easy-Out” variable insertion
depth version with 1- 1/4” NPT compres­sion tting, or the 65C-7 hot tap version.

Features

Two-Wire Transmitter built in

• Integral two-wire 4-20

mA transmitter can be fed
directly to PLC, DCS

Differential Measurement

• Replaceable Salt Bridge

• Long-lasting

• Low Maintenance Cost

• Field-proven

• Reduces ground loop problems

Easy Cleaning

• • Semi-ush face: re-

duced buildup

Temperature Compensation

• Automatic temperature compen-

sation on pH versions

Options

• Flow-through and submersion

• Hot-Tap available

• Flat-faced available (pH)

• Gold electrode available (ORP)

• Differential pH & ORP ver-

sions without 2 wire transmitter
available (see P/R60 series)

Applications

• Process Control

• Industrial and Municipal Wa-

ter Treatment

• Industrial and Municipal

Waste Treatment and Neutral­ization

• Fume Scrubbers, Plating,

Circuit Board Manufacturing,
Food and Beverage, Chemi­cal Processing, Pulp and Pa­per, Mining, Power Generation,
Pharmaceutical Industry

by

Andover, MA 01810

Toll free - 855-747-7623

www.WaterAnalytics.net

Metrix

100 School Street

978-749-9949

Model P65C/R65C pH or ORP Probes with 4-20 mA Output

18”

1.25” NPT

Compression

Fitting

Technical Data

Measuring Range

pH 0 to 14 pH (Consult factory for applications

below 2 or above 12).

ORP -500 to +500 mV or

0 mV to +1000 mV, eld selectable

Flow Rate 10 ft./sec maximum (3 metres/sec)

Flow should be as low as possible in low
conductivity water and in solutions with
high suspended solids

Wetted Materials CPVC, kynar, glass, titanium palladium al-

loy and EPDM (platinum for ORP probe);
opt. viton and ceramic

Transmission Distance Dependant upon transmission distance

and supply voltage

Sensitivity

pH 0.001 pH

ORP 0.1 mV

Stability

pH 0.03 pH per day, non- cumulative

ORP 2 mV per day, non-cumulative

Temperature Copensation

Automatic -5 to 95°C (23 to 203°F)

Pressure Limit 100 psig at 65°C maximum

Temperature Limits

CPVC -5 to 95°C (23 to 203°F)

The temperature limit of probes in ow­through applications is limited by pressure
and by the pipe tting material.

Probe Cable 5 Conductor plus shield, 15 ft. (4.6m) long

Dimensions

Related Products

CABLES & ACCESORIES

JB1 NEMA 4X junction box

C42-1-XXX Interconnect cable; dressed both ends - specify length

C35-17(K) Salt Bridge Kit for P/R65C- 4/- 6/-7 probes, package of 3

AM60-9765K Salt Bridge Kit, all P/R65C-8 probes, package of 3

P60-HTC Hot Tap Ball Valve assembly

CALIBR ATION SOLUTIONS

A35-13 pH 4 Buffer, 500 mL.

A35-14 pH 7 Buffer, 500 mL

A35-24 pH 10 Buffer, 500 mL

A35-40 ORP Buffer, 200 mV, 500 mL

A35-41 ORP Buffer, 600 mV, 500 mL

Ordering Information

P/R65C-8 Flow-through or submersion applications; body threaded 1-1/2” both ends (P-pH; R- ORP)

P/R65C-6 “Easy-in Easy out” variable insertion depth, 1-1/4” tting (P-pH; R-ORP)

P/R65C-7 For use with Hot-Tap hardware (P-pH; R-ORP)

P65C-8-F Flat-Face pH probe

P65C-8-A Antimony pH probe

R65C-8-G ORP probe with Gold electrode

www.WaterAnalytics.net 978-749-9949 Toll free - 855-747-7623 (855-pHProbe)