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3900
Product Data Sheet
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Rosemount 3900, 3900VP Product Data Sheet

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Rosemount™ 3900/3900VP
General Purpose pH/ORP Sensors
Product Data Sheet
00813-0100-3900, Rev AB
October 2019
High performance for your process pH/ORP needs
Rosemount 3900/3900VP October 2019

Overview

A robust sensor design
■
Extended sensor life and protection against poisoning ions using a double junction reference.
■
Enhanced performance and increased life with cracking resistant glass.
■
Maximum chemical resistance provided by a rugged polyphenylene sulfide body.
■
Operates in sub-zero temperatures down to 14 °F (-10 °C).
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Built-ins solution ground for advanced diagnostics.
Versatile installation options
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The sensor body features a one-piece construction with both front facing and rear facing process threads.
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¾-in. and 1-in. MNPT process connections to meet a variety of application installation requirements.
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Variopol (VP8) cable connection option, for quick cable-to-sensor release, eliminates cable twisting.
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.

Ordering information

The Rosemount 3900 and 3900VP General Purpose pH/ORP sensors feature a chemically resistant Ryton® plastic body, along with a built-in solution ground for advanced diagnostics and a Pt-100 resistance temperature device (RTD) for temperature compensation. These sensors are available with either an integral cable connection (Rosemount 3900) or Variopol (VP8) connector (Rosemount 3900VP). Variopol cables are sold separately (see Accessories).
Contents
Overview........................................................................................................................................................................................... 2
Ordering information........................................................................................................................................................................ 2
Specifications.................................................................................................................................................................................... 4
Dimensional and installation drawings.............................................................................................................................................. 5
Accessories......................................................................................................................................................................................16
2 Emerson.com/Rosemount
October 2019 Rosemount 3900/3900VP
Table 1: Rosemount 3900 Ordering Information
Option Description
3900 General Purpose pH/ORP Sensor
Preamplifier option
01 SMART preamplifier, 32-ft. (10 m) cable (standard preamplifier if used with ORP)
02 No preamplifier, 15-ft. (5 m) cable
04 SMART preamplifier, 50-ft. (15 m) cable (standard preamplifier if used with ORP)
05 SMART preamplifier, 66-ft. (20 m) cable (standard preamplifier if used with ORP)
06 SMART preamplifier, 100-ft. (30 m) cable (standard preamplifier if used with ORP)
07 No preamplifier, 4-ft. (1 m) cable
08 No preamplifier, 10-ft. (3 m) cable
Measuring code
10 General purpose low resistivity (GPLR) pH glass (0-14 pH)
12 Platinum ORP
Calibration certificates - optional level
CC Certificate of Calibration (no test data given)
LC Loop Calibration Certificate (sensor and transmitter calibrated together, with test
data)
EC Electronic Calibration Certificate (sensor calibrated against factory instrument, with
test data)
Note
The Rosemount 3900 pH/ORP sensor is housed in a Ryton plastic body with built-in solution ground for advanced diagnostics. Pt-100 is offered for a temperature compensator. The sensor is available with an integral cable. You can mount the sensor using a process connector, both ordered separately. You can also order junction box kits with preamplifiers separately if the transmitter does not have an integral preamplifier with 15 ft. (5 m) of the sensor.
Table 2: Rosemount 3900VP Ordering Information
Option Description
3900VP General Purpose pH/ORP Sensor with Variopol connector
Preamplifier option
01 SMART preamplifier (standard preamplifier if used with ORP)
02 No preamplifier
Measuring code
10 General purposel low resistivity (GPLR) pH glass (0-14 pH)
12 Platinum ORP
Calibration certificates - optional level
CC Certificate of Calibration (no test data given)
LC Loop Calibration Certificate (sensor and transmitter calibrated together, with test
data)
Rosemount 3900/3900VP 3
Rosemount 3900/3900VP October 2019
Table 2: Rosemount 3900VP Ordering Information (continued)
Option Description
EC Electronic Calibration Certificate (sensor calibrated against factory instrument, with
test data)

Specifications

Table 3: Percent Linearity over pH Range
pH range Linearity
0-7 97%
1-7 98%
4-7 98%
7-10 99%
7-12 97%
7-13 96%
7-14 95%
Table 4: Rosemount 3900/3900VP pH/ORP Sensor Specifications
Measurement range
pH 0 to 14
ORP -1500 to +1500 mV
Operating temperature
14 to 212 °F (-10 to 100 °C), automatic temperature compensation from 14 to 212 °F (-10 to 100 °C)
Maximum pressure
100 psig (790 kPa [abs]) at 212 °F (100 °C) CRN rating: 60 psig up to 212 °F (100 °C)
Materials of construction
Sensor body Ryton®: polyphenylene sulfide (PPS)
O-ring EPDM
pH electrode Glass
ORP electrode Glass, platinum
Solution ground Stainless steel
Reference junction PFTE (Teflon®)
Conductivity
Responds to changes in pH at a minimum conductivity of 0.1 µS/cm when used with the low flow panel. The sample flow rate must be controlled to 2 gallons per hour (7.61 liters per hour).
Process connection
Front facing ¾-in. and 1-in. MNPT
4 Emerson.com/Rosemount
October 2019
Table 4: Rosemount 3900/3900VP pH/ORP Sensor Specifications (continued)
Rear facing 1-in. MNPT
Temperature compensation
Pt-100
Cable
3900 Various cable lengths (see Ordering information) with integral preamplifier; 15-ft.
(4.6 m) and less without preamplifier
3900VP Use 24281-XX, 2.5-ft. (0.8 m) to 100 ft. (30.5 m). See Accessories.
Weight/shipping weight
1 lb./2 lb. (0.45 kg/0.9 kg)
Rosemount 3900/3900VP

Dimensional and installation drawings

Figure 1: Proper Sensor Installation Orientation
Install sensor within 80 degrees of vertical.
Rosemount 3900/3900VP 5
Rosemount 3900/3900VP
Figure 2: Rosemount 3900 with Integral Cable Connection
October 2019
A. 1-in. MNPT B. Wrench flats, 1.30 in. across C. 1-in. MNPT
D. ¾-in. MNPT
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October 2019 Rosemount 3900/3900VP
Figure 3: Rosemount 3900VP with Variopol Cable Connection
A. Temperature compensation solution ground B. Reference junction C. pH electrode
Table 5: Horizontal Pipe Tee (PN 2002011) Pressure/Temperature Ratings
psig (kpa [abs]) °F (°C)
150 (1136) 150 (65)
128 (984) 160 (71)
102 (805) 170 (77)
80 (653) 180 (82)
57 (494) 200 (93)
48 (432) 210 (99)
Rosemount 3900/3900VP 7
Rosemount 3900/3900VP October 2019
Figure 4: Typical Flow-through Insertion Installation using PN 2002011 Pipe Tee
A. 1½-in. x 1-in. reducing bushing B. 1½-in. pipe tee PN 2002011
Table 6: Low Flow Cell Specifications PN 24091-00/24091-02
Wetted materials
Body and nut Polyester/polycarbonate
Fittings 316 stainless steel
Seals Silicone
Flow cell ratings
Temperature 32 to 158 °F (0 to 70 °C)
Maximum pressure 90 psig (721 kPa [abs])
Flow rate 2 to 5 gallons per hour (7,6 to 18,9 liters per hour)
Sensor threaded connection
24091-00 1-in. NPT adapter
24091-02 ¾-in. NPT adapter
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October 2019
Figure 5: Low Flow Cell (PN 24091-00)
Rosemount 3900/3900VP
A. Inches B. Millimeters C. Outlet
D. Inlet
Rosemount 3900/3900VP 9
Rosemount 3900/3900VP
Figure 6: Flow-through Tee (2-in.) (PN 914240-XX)
October 2019
A. Adapter
10 Emerson.com/Rosemount
October 2019 Rosemount 3900/3900VP
The following flow-through tees are available for the Rosemount 3900/3900VP.
■
915240-03
■
915240-04
■
915240-05
For a new installation, use the appropriate tee above and add the S10283-LQD adapter.
When replacing an existing Rosemount 399 with a Rosemount 3900 sensor, add the S10283-LQD adapter to convert the tee to accept the Rosemount 3900 sensor.
Rosemount 3900/3900VP 11
Rosemount 3900/3900VP
Figure 7: Jet Spray Cleaner
October 2019
A. Cleaning solution by others. B. Solenoid valve or manual valve (supplied by others). C. Corrosion resistant tubing (supplied by others).
D. Polypropylene ¼-in. compression fitting.
E. ¼-in. 316 stainless steel.
F. ¼-in. polypropylene. G. Stainless set screw for adjustable spray nozzle height. H. 2-in. NPT threads.
I. Sensor. J. 1-in. PVC coupling for submersible applications (supplied by others).
K. 1-in. PVC or stainless conduit (supplied by others).
L. Cable.
M. Timer supplied by others or use timer feature in Rosemount instrument.
12 Emerson.com/Rosemount
October 2019 Rosemount 3900/3900VP
Figure 8: Rosemount 3900 Sensor with Jet Spray Cleaner
The jet spray cleaner eliminates routine, manual sensor maintenance by cleaning the sensor with water or compressed air. You can control flow through the cleaner with a solenoid valve.
Note
You can use the jet spray cleaner with the handrail mounting assembly (PN 11275-01, not shown), or you can mount it through the conduit as shown in Figure 8.
Rosemount 3900/3900VP 13
Rosemount 3900/3900VP October 2019
Figure 9: Low Flow Panel PN SQP10077-LQD
14 Emerson.com/Rosemount
October 2019 Rosemount 3900/3900VP
Table 7: Low Flow Panel Specifications
Inlet flow 3 to 80 gallons per hour (11,4 to 304 liters per hour)
Inlet pressure 3 to 65 psig (122 to 549 kPa [abs])
(1)
Temperature 32 to 122 °F (0 to 50 °C)
The minimum inlet pressure is required to open a check valve, which prevents the flow cell from draining if sample flow is lost. Removing the
(1)
check valve lowers the inlet pressure requirement to a few feet of water head.
Rosemount 3900/3900VP 15
Rosemount 3900/3900VP October 2019

Accessories

Table 8: Accessories
Part number Description
11275-01 Handrail mounting assembly
12707-00 Jet spray cleaner
2002011 CPVC flow-through tee, 1½-in. NPT process connection
23242-02 Mounting adapter, 1½-in. insertion, 1 x ¾-in.
23555-00 Junction box, Rosemount 54/5081/1055/Xmt compatible preamplifier
24091-00 Cell, low flow, ¼-in. inlet and outlet
33894-00 Adapter, 1-in. NPT low flow cell
24281-00 15-ft. (4.6 m) VP8 cable
24281-01 25-ft. (7.6 m) VP8 cable
24281-02 2.5-ft. (0.8 m) VP8 cable
24281-03 50-ft. (15.2 m) VP8 cable
24281-04 100-ft. (30.5 m) VP8 cable
24281-05 4-ft. (1.2 m) VP8 cable
24281-06 10-ft. (3 m) VP8 cable
24281-07 20-ft. (6.1 m) VP8 cable
24281-08 30-ft. (9.1 m) VP8 cable
9200273 Extension cable, 11-conduit, shielded, unprepped, per foot
9210012 Buffer solution, pH 4.01, 16 oz. (473 ml)
9210013 Buffer solution, pH 6.86, 16 oz. (473 ml)
9210014 Buffer solution, pH 9.18, 16 oz. (473 ml)
SQP10077-LQD Low flow panel
16 Emerson.com/Rosemount
October 2019 Rosemount 3900/3900VP
Rosemount 3900/3900VP 17
Rosemount 3900/3900VP October 2019
18 Emerson.com/Rosemount
October 2019 Rosemount 3900/3900VP
Rosemount 3900/3900VP 19
00813-0100-3900
Rev. AB
October 2019
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