Section F
Precision Measures Perfection
THERMOMETER
THERMOMETERS
The following pages contain data on the Rhomberg range of Bimetal thermometers, "V" Line Liquid / Mercury in Glass thermometers,
the Nitrogen Gas range of thermometers and the Digital Indicators employing either Thermocouples or Resistance thermometer inputs.
V-Line Glass Thermometers
The operation of the glass thermometer is similar to that of other thermometers using the liquid or gas expansion principle. The sealed
glass capillary contains a small bulb filled with a liquid or mercury. This fluid will expand with the application of temperature and will rise
into the capillary. A scale is fixed in a corresponding position next to the capillary. The latter concept is used in the "V" line case design.
Bimetal Thermometers
Unlike most dial indicating instruments, the Bi-Metal Thermometer has no pinion and segment movement and the pointer is directly
driven by the coiled bimetallic strip. This simple, yet rugged construction ensures long, trouble free service with enduring accuracy.
Gas Actuated Thermometers
The "natural" successor to the mercury activated thermometer. The Nitrogen gas charged system has become entrenched as the most
frequently demanded alternative! The system comprises a measuring coil with geared movement and probe. Nitrogen gas is inert, non
toxic, colourless and odourless. Application of heat to the probe will result in an expansion of the gas, which will result in an expansion
of the measuring coil. It is this reaction of the coil that is translated into a reading via the pointer onto a calibrated dial.
DigiTemp Digital Pressure Gauges & Transmitters
These battery powered digital temperature indicators are available with either a type K thermocouple or Pt1000
resistance thermometer input. A clear 4 digit liquid crystal display indicates the measured temperature value across
a range of -100 to 800C. Power supply is either from two 1.5V AA cells or, in transmitter mode, a two wire 24VDC
supply. Intrinsically safe versions to Eex ia 11C are also available.
INDEX
TGX: V-Line Thermometer
TBS: Bi-Metal Thermometer
DTS/DRS: Digital Thermometer & Transmitter
TPB: Gas Thermometer
For more info: www.rhomberg.co.za
TGX
V-Li ne Th ermomet ers
Application Examples
V-line thermometers (liquid-in-glass thermometers) are typically
used in:
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·
·
·
·
·
·
Diesel engines
Refrigeration and heating
Chemical and petrochemical plants
Compressors
Ship yards
Turbines
Power stations
ORDERING CODE
SEE PAGE ?? FOR ORDERING OPTIONS
Introduction
This instrument uses a graduated glass thermometer as
an indicator. The divisions are etched on to the glass itself
and the scale is printed on to the corresponding "V"
formed aluminium housing. The assembly of the
thermometer is practical and resistant to breakage if
correctly installed.
disturbing the contents of the vessel or pipeline. Special
elastomers are fitted to render the glass capillary vibration
resistant and the "V" formation of the housing protects the
glass from external damage.
All components are readily disassembled even on
pipelines or tanks holding contents. This is made possible
as the pocket or thermowell can be left in place without
Dimensional Diagrams
G
Specs.
63mm
100mm
A
B
34.8 200.0
34.8 200.0
C
D
E
F
G
35.8
35.8
95.0
135.0
31.2
31.2
95.0
135.0
17.6
17.6
B
A
E
D
F
C
Dimensions in mm
The combination of anodised aluminium and glass with
etched numerals and graduations is highly resistant to sea
water, acids, alkali and solvents and is thus suitable for use
in a very wide range of applications.
Specifications
Design: Durable design, indicator housing/ glass insert/
thermowell/pocket/ components easily
interchangeable.
Temperature Ranges: -60 up to 600 ºC
Insertion Lengths: 63mm, 100mm and 150mm
Housing: Die Cast Aluminium; Brass anodised, VShaped scale section
Stem Configurations: Vertical or 90 Degree Angle
Thermowell/pocket: Brass or Stainless Steel
Process Connection: ½" BSP or NPT
Glass Thermometer: Vibration resistant with Blue Spirit
or Mercury filled columns.
Accuracy: 1%
Construction
The liquid-in-glass thermometer is very sensitive to
temperature fluctuations and will give accurate, reliable
indications over a wide range of temperatures. The
indicator housing is forged in aluminium and the surface is
anodised in a bright brass finish. The temperature
measuring units are etched on the "V" formation of the
housing, whilst the glass tube is etched with the
corresponding temperature increments and is recessed
into this "V" section of the shroud.
Ordering Code
TGX
S
200
63
BB
14
0/100
TEMPERATURE
RANGE
Temp. range
Code
-50/0/30
-50/0/30°C
-30/0/50
-30/0/50°C
0/50
0/50°C
0/100
0/100°C
0/120
0/120°C
0/160
0/160°C
0/200
0/200°C
0/300
0/300°C
0/400
0/400°C
0/500
0/500°C
0/600
0/600°C
PROCESS CONNECTION
BULB MATERIAL
Code
BB
SS
MOUNTING
Denote V-Line
Code
200
Code
S
B
Process connection
1/2" NPT
1/2" BSP
Code
63
10
15
Bulb length
63mm
100mm
150mm
Bulb material
Brass (up to 300°C)
316L Stainless steel
BULB LENGTH
CASE SIZE
Code
04
14
Case size
200mm
Mounting
Vertical
90° Back entry
For more info: www.rhomberg.co.za
THERMOMETERS
Operating Conditions
THERMOMETER
Precision Measures Perfection