Rosemount Analytical 3900 Specifications

Rosemount™ 3900/3900VP

General Purpose pH/ORP Sensors

Product Data Sheet

June 2017

LIQ-PDS-3900

High performance for your process pH/ORP needs

The Rosemount 3900 and 3900VP pH/ORP combination sensors are used for reliable pH or oxidation/reduction potential
measurements of aqueous solutions in pipelines, open tanks, or ponds. Its robust sensor design allows the Rosemount 3900 and
3900VP sensors to be used in a wide range of applications.

Rosemount 3900/3900VP General Purpose pH/ORP Sensors

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).

 Built-in solution ground for advanced diagnostics.

Versatile Installation Options

 The sensor body features a one-piece construction with both

front facing and rear facing process threads.

June 2017

Contents

 ¾ in. and 1 in. MNPT process connections to meet a variety of

application installation requirements.

 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.

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2

Product Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Dimensional and Installation Drawings . . . . . . . . . . . . . . 6

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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June 2017

Rosemount 3900/3900VP General Purpose pH/ORP Sensors

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 RTD for temperature compensation. These sensors
are available with either an integral cable connection (3900) or Variopol (VP8)
connector (3900VP). Variopol cables are sold separately (see

Table 1. Rosemount 3900 pH/ORP Sensor ordering information

Model Sensor Type

3900 pH/ORP sensor

Preamplifier Option

01 Preamplifier

02 No preamplifier

(1)

(2)

Accessories ).

Measuring Electrode

10 General Purpose Low Resistivity (GPLR) pH glass

12 Platinum ORP

Typical Model Number: 3900-01-10

1. Preamplifier is SMART with -10 option and a standard preamplifier if with -12 option. Comes with 32 ft. (10 m) of integral cable.

2. Comes standard with 15 ft. (4.7 m) of integral cable.

Table 2. Rosemount 3900VP pH/ORP Sensor with Variopol cable connection ordering information

Model Sensor Type

3900VP pH/ORP sensor

Preamplifier Option

01 Preamplifier

02 No preamplifier

(1)

Measuring Electrode

10 General Purpose Low Resistivity (GPLR) pH glass

12 Platinum ORP

Typical Model Number: 3900VP-01-10

1. Preamplifier is SMART with -10 option and a standard preamplifier if with -12 option.

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Rosemount 3900/3900VP General Purpose pH/ORP Sensors

Specifications

Table 3. Percent linearity over pH range

June 2017

pH Range

Linearity

0-7 1-7 4-7 7-10 7-12 7-13 7-14

97% 98% 98% 99% 97% 96% 95%

Table 4. Rosemount 3900/3900VP pH/ORP Sensor specification

Measurement Range

pH 0 to 14

ORP -1500 to +1500 mV

Operating Temperature

-10 to 100 °C (14 to 212 °F), Automatic temperature compensation from -10 to 100 °C (14 to 212 °F)

Maximum Pressure

100 psig (790 kPa [abs]) at 100 °C (212 °F)
CRN Rating: 60 psig up to 100 °C (212 °F)

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 PTFE (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 GPH (7.6 L/hr)

Process Connection

Front Facing ¾ in. and 1 in. MNPT

Rear Facing 1 in. MNPT

Temperature Compensation

Pt-100

Cable

3900 32 ft (10m) cable with integral preamplifier; 15 ft (4.7m) cable without preamplifier

3900VP Use 24281-XX, 2.5 ft (.8m) to 100 ft (31m) (see

Accessories )

Weight/Shipping Weight

0.45 kg/0.9 kg (1 lb/2 lb)

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June 2017

Rosemount 3900/3900VP General Purpose pH/ORP Sensors

Product Certifications

IECEx

3900/3900VP without preamp (pH and ORP) – Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C)

3900/3900VP with SMART preamp (pH only) – Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C)

Per standards IEC60079-0: 2011, IEC 60079-11: 2011

ATEX

3900/3900VP without preamp (pH and ORP) – II 1 G Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C)

3900/3900VP with SMART preamp (pH only) – II 1 G Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C)

Per standards EN 60079-0: 2012+A11:2013, EN 60079-11:2012

FM

3900/3900VP with SMART preamp (pH only), with standard preamp (ORP only), and without preamp (pH and ORP):

Intrinsically Safe for use in Class I, II, and III, Division 1, Groups A, B, C, D, E, F, and G; Temperature Class T6 Ta = -20 °C to +60 °C

Intrinsically Safe for use in Class I, Zone 0, AEx ia IIC T6 Ta = -20 °C to +60 °C

Nonincendive for use in Class I, Division 2, Groups A, B, C, and D; Temperature Class T6 Ta = -20 °C to +60 °C

Suitable for use in Class II and III, Division 2, Groups E, F, and G; Temperature Class T6 Ta = -20 °C to +60 °C Hazardous (Classified)

Locations

IS/I,II,III/1/ABCDEFG/T6 Ta = 60 °C - 1400332; Entity; I/0/AEx ia IIC/T6 Ta = 60 °C - 1400332; Entity; NI/I/2/ABCD/T6 Ta = 60 °C;
S/II,III/2/EFG/T6 Ta = 60 °C

Per standards 3600:1998, 3610:2010, 3611:2044, 3810:2005

CSA

3900/3900VP with SMART preamp (pH only) – Intrinsically Safe:

Class I, Division 1, Groups ABCD; Class II, Division 1, Groups EFG; Class III; Class I, Division 2, Groups ABCD; Ambient temperature
rating -20 °C to +60 °C; Ex ia IIC; T6

3900/3900VP without preamp (pH and ORP) – Intrinsically Safe and Non-Incendive:

Class I, Division 1, Groups ABCD; Class II, Division 1, Groups EFG; Class III; Class I, Division 2, Groups ABCD; Ex ia IIC; T6; Ambient
temperature rating -20 °C to +60 °C: (Simple Apparatus)

Per standards C22.2 No. 142 – M1987, C22.2 No 157 – M1992, CAN/CSA E60079-0:07, CAN/CSA E60079-11:02, UL 50, UL 508, UL
913, UL 60079-0: 2005, UL 60079-11: 2002

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Rosemount 3900/3900VP General Purpose pH/ORP Sensors

Dimensional and Installation Drawings

Figure 1. Proper sensor installation orientation

Figure 2. Dimensional Drawing for the Rosemount 3900/3900VP Sensor

June 2017

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June 2017

Rosemount 3900/3900VP General Purpose pH/ORP Sensors

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)

Figure 3. Typical flow through insertion installation using PN 2002011 pipe tee

Table 6. Low flow cell specifications PN 24091-00/24091-02

Wetted Materials

Body and nut Polyester/Polycarbonate

Fittings 316 SST

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 GPH (7.6 to 18.9 LPH)

Sensor Threaded Connection

24091-00 1 in. NPT adapter

24091-02 ¾ in. NPT adapter

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Rosemount 3900/3900VP General Purpose pH/ORP Sensors

Figure 4. Low flow cell PN 24091-00/24091-02

June 2017

Figure 5. Flow-through tee (2 in.) (PN 915240-XX)

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June 2017

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 General Purpose pH/ORP Sensors

Figure 6. Jet spray cleaner PN 12707-00

The jet spray cleaner eliminates routine, manual sensor maintenance by cleaning the sensor with water or compressed air. Flow
through the cleaner can be controlled by a solenoid valve.

Note: The jet spray cleaner can be used with handrail mounting assembly (PN 11275-01, not shown) or can be mounted through
conduit as shown above.

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Rosemount 3900/3900VP General Purpose pH/ORP Sensors

Figure 7. Low flow panel PN SQP10077-LQD

June 2017

Table 7. Low flow panel specifications

Inlet flow

Inlet pressure

Temperature

(*) 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 check valve lo wers the inlet

pressure requirement to a few feet of water head.

3-80 gph (11.4-304 L/hr)

3 – 65 psig (122 – 549 kPa abs)*

32 - 122 °F (0 - 50 °C)

10

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June 2017

Rosemount 3900/3900VP General Purpose pH/ORP Sensors

Accessories

Table 8. Rosemount 3900/3900VP pH/ORP Sensor accessories information

Part number Description

24281-00 15 ft. cable with mating VP8 connector

24281-01 25 ft. cable with mating VP8 connector

24281-02 2.5 ft. cable with mating VP8 connector

24281-03 50 ft. cable with mating VP8 connector

24281-04 100 ft. cable with mating VP8 connector

24281-05 4 ft. cable with mating VP8 connector

24281-06 10 ft. cable with mating VP8 connector

24281-07 20 ft. cable with mating VP8 connector

24281-08 30 ft. cable with mating VP8 connector

12707-00 Jet spray cleaner

23242-02

24091-00 Low flow cell, 1 in. NPT adapter

24091-02 Low flow cell, ¾ in. NPT adapter

23555-00 Weatherproof junction box, with preamplifier

2002011 CPVC In-line Tee, 1.5 in. size, 1.0 in. threaded process connection

11275-01 Handrail mounting assembly

9200273 11-Conductor extension cable, shielded and unprepped (for use with remote junction box)

915240-03 PVC flow through Tee, ¾ in. NPT process connection

915240-04 PVC flow through Tee, 1 in. NPT process connection

915240-05 PVC flow through Tee, 1-½ in. NPT process connection

9210012 Buffer solution, 4.01 pH, 16 oz

9210013 Buffer solution, 6.86 pH, 16 oz

9210014 Buffer solution, 9.18 pH, 16 oz

SQP10077-LQD Low flow panel

Insertion mounting adapter, 1.5 in. MNPT process connection, 1 in. x ¾ in. FPT sensor adapter/union
thread size

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Rosemount 3900/3900VP General Purpose pH/ORP Sensors

LIQ-PDS-3900

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Product Data Sheet

June 2017

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