Rosemount Analytical 385+ Specifications
Rosemount™ 385+
General Purpose pH/ORP Sensors
Product Data Sheet
June 2017
LIQ-PDS-385+
High performance for your process pH/ORP needs
The Rosemount 385+ pH/ORP combination sensors are used for reliable pH or oxidation/reduction potential measurements of
aqueous solutions in pipelines, open tanks, or ponds. Rosemount 385+ sensors feature a triple junction reference that extends sensor
life in processes containing poisoning ions.
Rosemount 385+ General Purpose pH/ORP Sensors
Overview
A Robust Sensor Design
Extended sensor life and protection against poisoning ions
Enhanced performance and increased life with cracking
High pH glass option for greater performance and linearity at
Operates in pressures up to 100 psig at 100 °C.
Versatile Installation Options
The sensor features both a submersion/insertion and a
June 2017
using a triple junction reference.
resistant glass.
high process pH levels.
retractable version.
Safely rem ove a nd replace retractable sensors under pressure
without the need to shutdown your process.
Compatible for use with a 1-1/2 in. ball valve assembly.
SMART Preamplifier
Automatic recognition of pH sensors by Rosemount
transmitters: 1066, 1057, 1056, and 56
pH calibration data is stored which allows sensors to be
calibrated in advance for “Plug and Play” installations in the
field.
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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June 2017
Rosemount 385+ General Purpose pH/ORP Sensors
Ordering Information
The Rosemount 385+ pH/ORP sensor features a Tefzel sensor body with a triple
junction gel filled reference electrode and automatic temperature compensator
housed in a titanium tube. The retractable version of this sensor comes with an integral
sensor head junction box, a process connector, and integral preamplifier.
Interconnecting cable from sensor junction box to transmitter is sold separately (PN
23646-01 or 9200273; see Accessories).
Table 1. Rosemount 385+ General Purpose pH/ORP Sensor ordering information
Model Sensor type
385+ pH/ORP sensor
Body Configuration
02 Retractable with Integral Preamplifier
03 Insertion/Submersion with Integral Preamplifier and 25 ft. Integral Cable
04 Insertion/Submersion without Integral Preamplifier and 15 ft. Integral Cable
(1)
(1)
Measuring Electrode
10 pH - General Purpose Low Resistivity (GPLR) pH glass
11 High pH Glass
12 Platinum ORP
Typical Model Number: 385+-02-10
1. Preamplifier is SMART with -10 and -11 options and a standard preamplifier if with -12 option.
Specifications
Table 2. Rosemount 385+ General Purpose pH/ORP Sensor specifications
Measured Range
pH range 0 to 14 pH
ORP range -1500 mV to 1500 mV
Maximum Pressure at Retraction or Insertion (ball valve version)
542 KPa abs (64 psig)
Maximum Process Pressure and Temperature
790 KPa abs (100 psig) at 100 °C (212 °F)
Temperature Compensation
(pH only) 0 to 100°C (32 to 212°F)
Wetted Materials
Tefzel, titanium, EPDM, 316 SS and Teflon (Code 02), Viton, glass, ceramic and (ORP only) platinum.
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