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MODEL 385+ pH/ORP
DESCRIPTION AND SPECIFICATIONS
•
SMART enabled
•
RETRACTABLE VERSION allows removal and replacement under pressure without
process shutdown.
•
LONG-LIFE, TRIPLE JUNCTION REFERENCE ELECTRODE provides longer service life in
applications where poisoning ions are present.
•
DISPOSABLE TEFZEL AND TITANIUM DESIGN provides maximum chemical resistance
and economical advantage where minimum troubleshooting and maintenance downtime are
of prime importance.
•
PLATINUM ORP Electrode
1.1 FEATURES AND APPLICATIONS
The Triple-junction Model 385+ is now offered with
SMART capabilities. SMART option becomes enabled
when used with the Model 1056, 1057 Analyzer and on
6081P wireless transmitter. The pH-loop capabilities
include auto-recognition of the SMART sensor, auto-
matic upload of calibration data and associated time
stamp, historical recording of pH diagnostics (slope,
offset, reference impedance, glass impedance). This
trending data allows technicians to predict frequency of
maintenance and estimate sensor life for a particular
process condition. Additional SMART features include
factory calibration, resetting SMART sensor calibration
data with user menus without power cycling, and
manufacturing information.
The Model 385+ Sensor measures the pH or ORP
(Oxidation Reduction Potential) of aqueous solutions
in pipelines, open tanks, or ponds. It is suitable for
applications where a low cost, industrial, disposable
sensor is required. The combination electrode features
a peripheral ceramic junction. The triple junction
reference cell provides longer life in processes
containing sugar, ammonia, chlorides, sulfides or other
poisoning ions. The Model 385+ body is constructed
of molded, chemically resistant Tefzel in two standard
body versions.
The retraction version is housed in a titanium tube,
with a plug-in style surface mount preamplifier in a
weatherproof junction box. It is designed for use with a
standard 1-1/2 in. ball valve assembly for process
mounting where a separate sample stream is difficult
or impossible to
provide. The entire installation
process is accomplished without line depressurization
and minimal process fluid loss. Upon sensor removal,
from the ball valve, maintenance and replacement is
easy.
The insertion/submersion version has two body configu-
rations: 25 ft (7.6 m) integral cable and preamplifier; 15 ft
(4.5) integral cable for use with remote preamplifier.
SECTION 1.0
1.2 PERFORMANCE SPECIFICATIONS
Measuring Range: pH: 0-14 ±1500mV
ORP: –1500 to 1500 mV
0-2 pH
2-12 pH
12-13 pH
13-14 pH
Temperature Compensation: (pH only) 0 to 100°C
(32 to 212°F)
1.3 PHYSICAL SPECIFICATIONS
Wetted Materials: Tefzel, titanium, EPDM, 316 SS
and Teflon
(ORP only) platinum.
Maximum Process Pressure and Temperature:
790 KPa abs (100 psig) at 100°C (212°F)
Maximum Pressure at Retraction or Insertion
(ball valve version): 542 KPa abs (64 psig)
Process Connections: 1-1/2 in. with ball valve
1 in. without ball valve
Cable: P/N 9200273 (Unprepped) or P/N 23646-01
(Prepped)
Weight/Shipping Weight:
Submersion/insertion: 1.6 lb/2.8 lb 0.7Kg /1.25 Kg
Retraction: 6 lb/11 lb (2.7 Kg/5.0 Kg)
Ball Valve: 5 lb/10 lb (2.25 Kg/4.5 Kg)
1 Teflon is a registered trademark of E.I. du Pont de Nemours and Company.
2 Viton is a registered trademark of DuPont Performance Elastomers.
DESCRIPTION AND SPECIFICATIONS
Percent Linearity Over pH Range
Option 10
94%
99%
97%
92%
1
(Code 02), Viton
2
, glass, ceramic and
SECTION 1.0
Option 11
94%
97%
98%
98%
1
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