Specifications - Emerson Rosemount 389 Instruction Manual

Description and specifications
Rosemount 389/389VP sensors are combintation sensors (pH, reference, and temperature
within sensor body) and measure pH or ORP (oxidation/reduction potential) of aqueous
solutions in pipelines, open tanks, or ponds. rosemount 389/389VP sensors are suitable for
virtually all applications and are compatible with Rosemount and other manufacturers'
instruments.
Installation is easily achieved through the wide variety of mounting configurations. These
sensors feature a 1 inch (MNPT) front and rear facing connections for insertion,
submersion, or flow-through pH and ORP applications.
1.2

Specifications

Table 1-1: Percent linearity over pH range
pH range
0 to 2 pH
2 to 12 pH
12 to 13 pH
13 to 14 pH
Table 1-2: Rosemount 389/389VP pH/ORP sensor specifications
Measurement range
pH
ORP
Temperature range
32 to 185 °F (0 to 85 °C)
Automatic temperature compensation : 32 to 185 °F (0 to 85 °C)
Maximum pressure
100 psig (790 kPa[abs]) at 150 °F (65 °C) - see
Materials of construction
Sensor body
pH electrode
ORP electrode
Junction
O-ring
Process connections
Front facing
Rear facing
2
GPLR glass (-10)
94%
99%
97%
92%
0 to 14
-1500 to +1500 mV
Figure 1-1
Tefzel
Glass
Platinum
Ceramic
Viton
1 in. MNPT
1 in. MNPT
High pH glass (-11)
94%
97%
98%
98%
389/389VP