Specifications - Emerson Rosemount 398R Reference Manual

Description and Specifications
February 2019
1.2

Specifications

Table 1-1: Percent linearity over pH
pH Range
0-2 pH
2-12 pH
12-13 pH
13-14 pH
Table 1-2: Rosemount 398R-398RVP sensor specifications
Measured Range
pH range
ORP range
Maximum Pressure at Retraction or Insertion
64 psig (524 kPa abs) Code 21
35 psig (343 kPa abs) Code 25
Minimum Conductivity
75 S/cm, nominal 100 S/cm
Maximum Process Pressure and Temperature
Hemi bulb: 250 psig (1825 kPa abs) at 212°F (100°C)
Flat bulb: 100 psig (790 kPa abs) at 212°F (100°C)
Wetted Materials
Titanium, Tefzel®, glass, platinum (ORP only), and choice of Viton® or Kalrez®
Reference
Permeable Tefzel with secondary helical pathway
Weight/Shipping Weight
Sensor
Process Connections
With ball valve
Without ball valve
Cable Length
Rosemount 398R
Rosemount 398RVP
2
Hemi Bulb
94%
99%
97%
92%
0 to 14 pH, GPHT ACCUGLASS
-1500 mV to 1500 mV
Code 21; 2.0 lb/3.0 lb (.9kg/1.40kg)
Code 25; 3.0 lb/4.0 lb (1.40 kg/1.80kg)
1-1/2 in.
1 in.
Standard 15 ft. Integral Cable; Optional 9.5 inch Cable for wiring to Sensor Head Junction
Boxes
Must use VP interconnect cable (sold separately)
Reference Manual
00809-0100-3098
Description and Specifications