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Rosemount™ 372
HF Resistant pH Sensor
Product Data Sheet
June 2017
LIQ-PDS-372
A robust pH sensor for challenging water applications
The Rosemount 372 sensor is ideal for measuring pH in etching solutions or waste water containing fluoride or hydrofluoric acid.
These sensors feature a special fluoride and acid resistant pH glass formulation allowing for improved lifetime in processes containing
fluoride ions.
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Rosemount 372 HF Resistant pH Sensor
Overview
June 2017
High Performance Design
Special fluoride and acid resistant pH glass formulation
extends sensor life and resistance to process attack.
Poisoning ion resistant double junction reference cell design.
Chemically resistant Ultem body construction.
¾ in. MNPT forward facing and 1 in. MNPT rear facing process
connections allow for flexible insertion and submersion type
installation.
Hydrofluoric Acid Resistant
Glass composition reduces HF attack by more than a factor of
ten.
Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
www.Emerson.com/RosemountLiquidAnalysis
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June 2017
Ordering Information
The Rosemount 372 HF resistant pH sensor is designed for extended lifetime in
processes containing fluoride ions. Sensors come standard with a Pt-100 RTD for
temperature measurement and compensation. Sensors are available with or without an
integral preamplifier.
Table 1. Rosemount 372 pH Sensor ordering information
Model Sensor type
372 pH Sensor
Preamplifier/cable
01 25 ft. Integral Cable with Integral Preamplifier
02 15 ft. Integral Cable without Integral Preamplifier
Typical Model Number:372-01
Rosemount 372 HF Resistant pH Sensor
www.Emerson.com/RosemountLiquidAnalysis
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Rosemount 372 HF Resistant pH Sensor
Specifications
Table 2. Rosemount 372 HF resistant pH sensor specifications
Materials of construction
Ultem, Viton, glass, Kynar
Process connections
3/4 in. forward (insertion) and 1 in. reverse (submersion) MNPT
Insertion depth
2.2 in. to 8.3 in.
Measured range
0 to 12 pH (0-14 pH if no sodium ions are present)
Pressure range
-13 to 135 psig (6.9 to 1035 kPa abs)
June 2017
Temperature range
-5 to 50 °C [23 to 122 °F] (100 °C [212 °F] if no fluoride ions are present)
Temperature compensation
Pt 100
Weight/shipping weight
0.4 kg/0.9 kg (1 lb/ 2 lb)
pH glass type
Hemispherical
Glass diameter
7.8mm
Glass impedance
Less than 400 MΩ @ 25 °C
Acidic error
Less than .01 pH in 1.0M HCl @ 0.0pH
Reference type
Double junction with saturated KCL in cross-linked polymer
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www.Emerson.com/RosemountLiquidAnalysis
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June 2017
Dimensional Drawings
Figure 1. Rosemount 372 pH Sensor Dimensional Drawing
Rosemount 372 HF Resistant pH Sensor
www.Emerson.com/RosemountLiquidAnalysis
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Rosemount 372 HF Resistant pH Sensor
LIQ-PDS-372
Global Headquarters
Emerson Automation Solutions
8200 Market Blvd
Chanhassen, MN 55317
+1 800 999 9307 or +1 952 906 8888
+1 952 949 7001
Liquid.CSC@Emerson.com
North America Regional Office
Emerson Automation Solutions
8200 Market Blvd.
Chanhassen, MN 55317, USA
+1 800 999 9307 or +1 952 906 8888
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Emerson Automation Solutions
1300 Concord Terrace, Suite 400
Sunrise, FL 33323, USA
+1 954 846 5030
+1 954 846 5121
RFQ.RMD-RCC@Emerson.com
Product Data Sheet
June 2017
Europe Regional Office
Emerson Automation Solutions GmbH
Neuhofstrasse 19a P.O. Box 1046
CH 6340 Baar
Switzerland
+41 (0) 41 768 6111
+41 (0) 41 768 6300
RFQ.RMD-RCC@Emerson.com
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1 Pandan Crescent
Singapore 128461
+65 6777 8211
+65 6777 0947
Enquiries@AP.Emerson.com
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Dubai, United Arab Emirates
+971 4 8118100
+971 4 8865465
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