Rosemount Analytical 389 Specifications

Rosemount™ 389/389VP

General Purpose pH/ORP Sensors

Product Data Sheet

June 2017

LIQ-PDS-389

Dependable pH/ORP measurements to solve your process needs

Rosemount 389/389VP sensors are suitable for use in a wide variety of applications. Reliably measure pH or Oxidation/Reduction
Potential of aqueous solutions in pipelines, open tanks, and ponds. Rosemount 389/389VP sensors are ideal for use in process
solutions containing poisoning ions.

Rosemount 389/389VP General Purpose pH/ORP Sensors

Overview

Reliability Meets Robustness

 A triple junction reference prolongs sensor life and protects

against poisoning ions such as ammonia, chlorine, cyanides,
and sulfides.

 Enhanced performance and increased life with cracking

resistant glass.

 Available with a glass electrode option for high pH

applications.

 Superior chemical resistance provided by a rugged Tefzel

body with Viton O-rings.

Ease of Installation

June 2017

 The molded sensor body features 1 in. MNPT front and rear

facing process connections for insertion, submersion, and
flow-through applications.

 Variopol (VP6) cable connection option, for quick

cable-to-sensor release, eliminates cable twisting (389VP).

Maintenance Made Simple

 Automatic recognition of pH sensors by Rosemount

transmitters: 56, 1056, 1057, and 1066 with integral SMART
preamplifier.

 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2

Product Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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June 2017

Rosemount 389/389VP General Purpose pH/ORP Sensors

Ordering Information

The Rosemount 389 and 389VP General Purpose pH/ORP Sensors are housed in a
molded Tefzel body with 1 in. MNPT forward and rear facing threads suitable for
insertion, submersion, or flow through installation. The sensors can be configured with
a general purpose pH, high pH, or platinum ORP electrode. Rosemount 389/389VP
sensors are offered with SMART preamplifiers for pH measurements and standard
integral preamplifiers for ORP measurements. These sensors may be configured
without a preamplifier but must be used with a remote preamplifier (j-box or
transmitter). Automatic temperature compensation is standard. Sensors are available
with either an integral cable connection (389) or Variopol (VP6) connector (389VP).
Variopol cables sold separately (see

Table 1. Rosemount 389 pH/ORP Sensor ordering information

Model Sensor Type

389 pH/ORP Sensor

Accessories ).

Preamplifier/Cable

01 Integral Preamplifier, 25 ft Cable

02 No Preamplifier, 15 ft Cable

(1)

Combination Electrode

10 pH - GPLR Glass

11 pH - High pH Glass

12 ORP

Transmitter/TC Compatibility

50 1181, 1050, 1060 (code -01 or -02)

54 1054A/B, 81, 2081 (code -01 or -02); for 54, 56, 1055, 1056, 1057, 1066, 5081, 6081, XMT (code -02 only)

55 54, 56, 1055, 1056, 1057, 5081, 6081, and XMT (code -01 only)

Optional

_ No Selection

62 Cable without BNC for Models: 54, 54, 1055, 1056, 1057, 1066, 5081, 6081, XMT (codes -02 and -54 only)

Typical Model Number: 389-02-10-54-62

1. Preamplifier is SMART if selected with pH electrode and option 55 only. Preamplifier is standard for ORP electrodes and for options 50 and 54.

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Rosemount 389/389VP General Purpose pH/ORP Sensors

Table 2. Rosemount 389VP pH/ORP Sensor ordering information

Model Sensor Type

389VP pH/ORP Sensor

Combination Electrode

10 pH - GPLR Glass

11 pH - High pH Glass

12 ORP

Transmitter/TC Compatibility

50 1181, 1050, 1060 (code -01 or -02)

54 1054A/B, 81, 2081 (code -01 or -02); for 54, 56, 1055, 1056, 1057, 1066, 5081, 6081, XMT (code -02 only)

55 54, 56, 1055, 1056, 1057, 5081, 6081, and XMT (code -01 only)

Preamplifier Option

_ No Preamplifier

70 SMART Preamplifier

(1)

June 2017

Typical Model Number: 389VP-10-55-70

1. Only available with -10, -11, and -55 options.

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June 2017

Rosemount 389/389VP General Purpose pH/ORP Sensors

Specifications

Table 3. Percent Linearity Over pH Range

pH Range GPLR Glass (-10) High pH Glass (-11)

0 to 2 pH 94% 94%

2 to 12 pH 99% 97%

12 to 13 pH 97% 98%

13 to 14 pH 92% 98%

Table 4. Rosemount 389/389VP pH/ORP Sensor specification

Measurement Range

pH 0 to 14

ORP -1500 to +1500 mV

Temperature Range

0 to 85 °C (32 to 185 °F)

Automatic temperature compensation: 0 to 85 °C (32 to 185 °F)

Maximum Pressure

100 psig (790 kPa [abs]) at 65 °C (150 °F) – see Figure 1

Materials of Construction

Sensor Body Tefzel

pH Electrode Glass

ORP Electrode Platinum

Junction Ceramic

O-ring Viton

Process Connections

Front Facing 1 in. MNPT

Rear Facing 1 in. MNPT

Cable

389 Integral Preamplifier – 25 ft (7.8 m); No Preamplifier – 15 ft (4.6 m)

389VP Use 24281-XX, 2.5 ft (0.8 m) to 100 ft (31m) (see

Accessories )

Weight/Shipping Weight

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

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Rosemount 389/389VP General Purpose pH/ORP Sensors

Figure 1. Pressure/temperature operating range for Rosemount 389/389VP

June 2017

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June 2017

IECEx

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

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

Sensors with standard preamp (ORP only) – Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +80°C) or Ex ia IIC T5 Ga (-20°C ≤ Ta ≤ +40°C)

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

ATE X

Sensors without preamp (pH and ORP) – II 1 G Ex ia IIC T4 Ga (-20˚C ≤ Ta ≤ +60˚C)

Sensors with SMART preamp (pH only) – II 1 G Ex ia IIC T4 Ga (-20˚C ≤ Ta ≤ +60˚C)

Sensors with standard preamp (ORP only) – II 1 G Ex ia IIC T4 Ga (-20˚C ≤ Ta ≤ +80˚C) or

II 1 G Ex ia IIC T5 Ga (-20˚C ≤ Ta ≤ +40˚C)

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

FM

See online FM Certificate of Compliance for applicable sensor options:

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; Entity Parameters

Per standards 3600:1998, 3610:2010, 3611:2004, 3810:2005

CSA

See online CSA Certificate of Compliance for applicable sensor options

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

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. 0-10, C22.2 No. 0.4-M2004, C22.2 No. 94-M1991, C22.2 No. 142 – M1987, C22.2 No
157 – M1992, CAN/CSA E60079-0:07, CAN/CSA E60079 - 11:02, UL50 11th Ed, UL508 17th Ed, UL913 7th Ed,
UL 60079-0: 2005, UL 60079-11: 2002

Rosemount 389/389VP General Purpose pH/ORP Sensors

Product Certifications

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Rosemount 389/389VP General Purpose pH/ORP Sensors

Dimensional Drawings

Figure 2. Rosemount 389 with integral cable connection dimensional drawing

Figure 3. Rosemount 389VP with Variopol cable connection dimensional drawing

June 2017

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June 2017

Figure 4. Flow through and insertion installations

Rosemount 389/389VP General Purpose pH/ORP Sensors

Figure 5. VP8 cable, instrument end

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Rosemount 389/389VP General Purpose pH/ORP Sensors

Figure 6. VP8 cable, sensor end

Figure 7. Submersion installation - Junction box and pipe mounting accessory

June 2017

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June 2017

Figure 8. Submersion installation - Handrail mounting accessory (PN 11275-01)

Rosemount 389/389VP General Purpose pH/ORP Sensors

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Rosemount 389/389VP General Purpose pH/ORP Sensors

Figure 9. Rosemount 389 with insertion adapter (PN 23242-02)

June 2017

The insertion adapter mounts the sensor into a 1½ in. NPT process pipe. Unscrewing the hex nut allows easy sensor removal without
twisting the sensor cable.

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June 2017

4.05

102.89

2.90

73.79

4.58

116.33

5.73

145.44

2.09

Inlet

Outlet

Millimeter

Inch

Figure 10. Low flow cell (PN 24091-00)

Rosemount 389/389VP General Purpose pH/ORP Sensors

Inlet and outlet connections are stainless steel and take ¼-in. OD tubing. Flow cell is polycarbonate with ¼-in. FNPT fittings.

Table 5. Low flow cell specifications (PN 24091-00)

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

1 in. NPT Adapter

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Rosemount 389/389VP General Purpose pH/ORP Sensors

Accessories

Table 6. Rosemount 389/389VP pH/ORP Sensor accessories information

Part number Description

11275-01 Handrail Mounting Assembly

12707-00 Jet Spray Cleaner

2002011 CPVC In-Line Tee, 1.5 in. Size, 1.0 in. Threaded Process Connection Ends

915240-03 PVC In-Line Tee, 2.0 in. Size, ¾ in. Threaded Process Connection Ends

915240-04 PVC In-Line Tee, 2.0 in. Size, 1.0 in. Threaded Process Connection Ends

915240-05 PVC In-Line Tee, 2.0 in. Size, 1.5 in. Threaded Process Connection Ends

23242-02

33081-00 PEEK Adapter Insert, 1 x ¾ in., for 23242-02

23646-01 11-Conductor Extension Cable, Shielded and Prepped (for use with Remote Junction Box)

9200273 11-Conductor Extension Cable, Shielded and Unprepped (for use with Remote Junction Box)

24091-00 Low Flow Cell, 1 in. Sensor Threaded Connection, ¼ in. Process Connection

23555-00 Weatherproof Junction Box, with Preamplifier

Insertion Mounting Adapter, 1.5 in. MNPT Process Connection, 1 in. x ¾ in. FPT Sensor Adapter/Union
Thread Size

June 2017

2002565 Mounting Bracket Kit

9210012 pH 4.01 Buffer Solution, 16 oz

9210013 pH 6.86 Buffer Solution, 16 oz

9210014 pH 9.18 Buffer Solution, 16 oz

R508-8OZ 475 mV ORP Standard Solution, 8 oz

9320057 PVC Union Adapter, 1 in. FNPT

24281-00 15 ft. VP8 Cable

24281-01 25 ft. VP8 Cable

24281-02 2.5 ft. VP8 Cable

24281-03 50 ft. VP8 Cable

24281-04 100 ft. VP8 Cable

24281-05 4 ft. VP8 Cable

24281-06 10 ft. VP8 Cable

24281-07 20 ft. VP8 Cable

24281-08 30 ft. VP8 Cable

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June 2017

Rosemount 389/389VP General Purpose pH/ORP Sensors

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Rosemount 389/389VP General Purpose pH/ORP Sensors

LIQ-PDS-389

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Product Data Sheet

June 2017

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