What is a Temperature Gauge, and what are their types & specifications?

What is a Temperature Gauge?

  • It is a field-mounted temperature sensor.
  • It measures the present temperature of the body.
  • The temperature gauge is a dial-type temperature-indicating device.
  • The gauge is used only for display purposes, but this is not used to control the temperature of the body.
  • Temperature gauges are available in various dial sizes, various ranges, and in different scales such as Degrees-Celsius and Degrees Fahrenheit scales.
  • Most of the process industries use gauges having a Degree Celsius scale.

Various types of gauges used in industries

temperature gauge

Bimetal Dial Thermometer Temperature Gauge

Features:

  • The bimetal Dial thermometer consists of a bimetal strip in the form of a helix
  • It works on the principle of thermal expansion: when two metals with different coefficients of expansions are joined to form a bimetal. The expansion of bimetal is proportional to changes in temperature.
  • Bimetal dial thermometers are simple in construction.
  • Rugged construction with Protection class IP-67
  • Suitable for most industrial process applications
  • The temperature range varies from – 50 to 600 Degrees Celsius.
  • It has a rigid stem with a fast Response is fast.
  • Hermetically sealed case.
  • It is available with bottom entry, back entry, and every angle rotatable construction.
  • Accuracy ± 1%Full Scale Deflection.
  • Repeatability is high and has minimum hysteresis.

Specifications:

Reference StandardASMEB 40.200, EN 13190
Dial100 mm or 150 mm aluminium white background  with black markings.
CaseStainless Steel-304 or 316 with bayonet bezel.
ProtectionWeatherproof IP – 67  class (IS/IEC : 60947 / IEC : 60529)
WindowShatter proof glass
PointerAluminium, black, micrometre adjustable
Stem  SS304 or SS316 in 6 mm, 8 mm, 10 mm, and 12 mm diameter, and length varies from 100 mm to 1000 mm.
ConnectionStandard  Half-inch NPT connection
Range50Degree C to 600 Degree C with a minimum span of 60 Degree C.
Accuracy± 1% Full Scale Deflection
Over range125% Full Scale Deflection up to max temperature range of 500°C
ResetMicrometer Pointer (standard), External (optional)
Optional  1) Silicon Oil Filled Case Suitable up to 339°C Max 2) Contacts: 1 SPST, N-O to close on the rise of drop in temperature (specify action required) adjustablefor full range, with a current rating of 30 VA @ 230 V AC, only for 100 mm dial, back entry.
Specifications

Ordering Information MODEL: BDT

MOUNTINGV Bottom Entry, Local Mounting
C Back Entry, Local Mounting
E Every Angle, Local Mounting
DIAL10 -100 mm
15 -150 mm
CASES4 SS304
S6 SS316
STEM Outer DiameterA 6 mm
B 8 mm
C 10 mm
D 12 mm
STEM LENGTHSpecify in mm
STEM MATERIALS4-SS304
S6-SS316
CONNECTION
SIZETYPEMALE/FEMALEMETRIC THREADS
6¼ inchNTNPTM Male18 M – M 18 * 1.5
103/8 inchBPBSPF Female20 M – M 20 * 1.5
15½inchBTBSPT24 M – M 24 * 1.5
20¾ inchPFPFXX- Any other
251 inchGSGas
NSNPS
RANGE0 to 600
UNITDegree Celsius, Degree Fahrenheit
OPTIONAThermo well
CColour Band
DDual Scale
E1 SPST Electrical contact
SSilicon Oil Filled Case *
* Silicon Oil Filled Case shall be applicable up to
the maximum temperature of 339°C only
** Ranges mentioned are in °C. An equivalent unit in °F can be provided on request
Ordering Information

Gas Filled Dial Thermometer Temperature Gauge

Features:

  • Gas-filled dial thermometer temperature gauges defeat the limitations of other temperature gauges
  • It operates over a wide temperature range of about – 200 to 800 Degrees Celsius
  • The stem is offered without accuracy loss.
  • The capillary length of this dial-type gauge is up to 25m
  • Inert (N2) gas is nonhazardous, and the nontoxic nature of the filled systems makes it an ideal choice for a cross-section of industries.
  • Suitable for sanitary application
  • All SS construction
  • Rigid stem or capillary type
  • Fast response
  • High reliability and accuracy ± 1% FSD
  • IP-67 protection

Specifications:

Reference StandardASMEB 40.200, EN 13190
SystemNitrogen Gas filled compensated in accordance with SAMA CI. Ill B
Dial100 mm or 150 mm aluminium white background  with black markings.
CaseStainless Steel-304 or 316 with bayonet bezel.
ProtectionWeatherproof IP – 67  class (IS/IEC : 60947 / IEC : 60529)
WindowShatter proof glass
PointerAluminium, black, micrometre adjustable
Stem  Stainless Steel- 304 or 316 in 6 mm, 8 mm, 10 mm, and 12 mm diameter as standard Connection
Connection11/2 inch NPT adjustable.
Range(-) 200°C to 800°C with a minimum span of 80°C
Accuracy± 1% FSD
Over range125% Full Scale Deflection up to max temperature range of 500°C
ResetMicrometer Pointer (standard)
Optional  Silicon Oil Filled Case Suitable for about  339°C
Specifications

Ordering Information:  GDT-R / GDT-C

GDT-R – Rigid Stem

GDT-C – Capillary Type

MOUNTINGV Bottom Entry, Local Mounting
C Back Entry, Local Mounting
E Every Angle, Local Mounting
S Bottom Entry, Surface Mounting
P Back Entry, Panel Mounting
Y Bottom Entry, 2″ Pipe Mounting
DIAL10 -100 mm
15 -150 mm
CASES4 SS304
S6 SS316
STEM Outer DiameterA 6 mm
B 8 mm
C 10 mm
D 12 mm
STEM LENGTHSpecify in mm
STEM MATERIALSO – SS310
S4-SS304
S6-SS316
16 – Inconel 600
CapillaryTypeLength
SC SS Covered
SP SS Covered + PVC
SA SS Covered + SS Armoured
SAP SS Covered + SS Armoured + PVC
N Not Applicable for GDT-R type.
In meter
CONNECTION
SIZETYPEMALE/FEMALEMETRIC THREADS
6¼ inchNTNPTM Male18 M – M 18 * 1.5
103/8 inchBPBSPF Female20 M – M 20 * 1.5
15½inchBTBSPT24 M – M 24 * 1.5
20¾ inchPFPFXX- Any other
251 inchGSGas
NSNPS
RANGE0 to 800
UNITDegree Celsius, Degree Fahrenheit
OPTIONAThermo well
CColour Band
DDual Scale
E1 SPST Electrical contact
SSilicon Oil Filled Case *
** Ranges mentioned are in °C. An equivalent unit in °F can be provided on request
Ordering Information

Liquid-Filled Dial Thermometer Temperature Gauge

Features:

  • Temperature measurement is based on the principle of liquid-filled expansion
  • Temperature range (-) 30°C to 250°C
  • Replaces mercury-type thermometers.
  • Used in various industries such as food processing, pharmaceutical, and biotechnology.
  • The main advantage is the minimum immersion length required for sensing (30mm) which makes it suitable for lower line sizes
  • Rugged construction.
  • Accuracy ± 1% FSD

Specifications:

Reference StandardASMEB 40.200, EN 13190
SystemLiquid-filled type compensated in accordance with SAMA CI. I-B
Dial100 mm or 150 mm aluminium white background  with black markings.
CaseStainless Steel-304 or 316 with bayonet bezel.
ProtectionWeatherproof IP – 67  class (IS/IEC : 60947 / IEC : 60529)
WindowShatter proof glass
PointerAluminium, black, micrometre adjustable
Stem  Stainless Steel- 304 or 316 in 6 mm, 8 mm, 10 mm, and 12 mm diameter as standard material.
(possible immersion length must be  about 30 mm)
CapillarySS Covered/SS Covered +
PVC/SS Covered +
SS armored/SS Covered +
SS Armoured +PVC (up to 5 Mtr.).
Connection1/2 inch NPTas standard with adjustable compression fitting.
Range(-) 30°C to 500°C with a minimum span of 50°C
Accuracy± 1% FSD
Over range125% FSD (up to max temp range of 500°C )
ResetMicrometer Pointer
Optional  Silicon Oil Filled Case
Specifications

Ordering Information  LDT-R / LDT-C:

LDT-R – Rigid Stem

LDT-C – Capillary Type

MOUNTINGV Bottom Entry, Local Mounting
C Back Entry, Local Mounting
E Every Angle, Local Mounting
S Bottom Entry, Surface Mounting
P Back Entry, Panel Mounting
Y Bottom Entry, 2″ Pipe Mounting
DIAL10 -100 mm
15 -150 mm
CASES4 SS304
S6 SS316
STEM Outer DiameterA 6 mm
B 8 mm
C 10 mm
D 12 mm
STEM LENGTHSpecify in mm
STEM MATERIALSO – SS310
S4-SS304
S6-SS316
16 – Inconel 600
CapillaryTypeLength
SC SS Covered
SP SS Covered + PVC
SA SS Covered + SS Armoured
SAP SS Covered + SS Armoured + PVC
N Not Applicable for LDT-R type.
In meter,
up to 5 Mtr max
CONNECTION
SIZETYPEMALE/FEMALEMETRIC THREADS
6¼ inchNTNPTM Male18 M – M 18 * 1.5
103/8 inchBPBSPF Female20 M – M 20 * 1.5
15½inchBTBSPT24 M – M 24 * 1.5
20¾ inchPFPFXX- Any other
251 inchGSGas
NSNPS
RANGE**0 to 250
UNITDegree Celsius, Degree Fahrenheit
OPTIONAThermo well
CColour Band
DDual Scale
E1 SPST Electrical contact
SSilicon Oil Filled Case *
** Ranges mentioned are in °C. An equivalent unit in °F can be provided on request
Ordering Information

Indicating Temperature Switch

Features:

  • Combines indication with switching in order to make or break the associated electrical circuit
  • Can be offered with contact assembly as well as micro switch (as a combination of switch and movement)
  • Fast response
  • Switching accuracy ± 2% FSD
  • High repeatability and low hysteresis
  • Flameproof version available
  • Case compensated system

Specifications:

Reference Nitrogen gas filled type compensated in accordance with SAMA CI. III-B
Dial100 mm or 150 mm aluminium white background  with black markings.
CaseStainless Steel-304 or 316 with bayonet bezel.
ProtectionWaterproof to IP – 67 (IS/IEC: 60947 / IEC: 60529)
Flameproof to IIA MB (Equivalent to NEC CI. I Div 2 Gr. C&D)
Flameproof to IIC (Equivalent to NEC CI. Div 1 Gr. A&B)
Stem  Stainless Steel-304/316 in 6 mm, 8 mm, 10 mm, 12 mm diameter as standard material.
CapillarySS Covered/SS Covered +
PVC/SS Covered +
SS armoured/SS Covered +
SS Armoured +PVC (up to 25 Mtr.).
Connection½ inch NPT compression fitting as the standard connection.
Range(-) 200°C to 800°C with a minimum span of 80°C
Accuracy± 1% FSD for indication, ± 2% FSD for switching.
Over range125% FSD
Contacts1) SPST, single, normally open, closes on rising in temperature or vice versa,
rated 30 VA @ 230V AC
Accessory Relay for the contact assembly to match the current of 5 amp @ 230 V AC  separate mounted.
Notea. Flameproof version is offered with Single Pole Double Throughput Micro switch in Die-Cast only in Aluminium housing.
b. For minimum insertion length essential for propersensing, contact our design department.
c. Three-point calibration certificate accompanies each thermometer.
d. For operating temp>600°C; the stem of SS310 / Inconel 600 shall be recommended.
Specifications

Ordering Information MODEL : GDT-SW-R / GDT-SW-C

GDT-SW-R – Rigid Stem

GDT-SW-C – Capillary Type

MOUNTINGV Bottom Entry, Local Mounting
C Back Entry, Local Mounting
E Every Angle, Local Mounting
S Bottom Entry, Surface Mounting
P Back Entry, Panel Mounting
Y Bottom Entry, 2″ Pipe Mounting
DIAL10 -100 mm
15 -150 mm
CASES4 SS304
S6 SS316
STEM Outer DiameterA 6 mm
B 8 mm
C 10 mm
D 12 mm
STEM LENGTHSpecify in mm
STEM MATERIALSO – SS310
S4-SS304
S6-SS316
16 – Inconel 600
CapillaryTypeLength
SC SS Covered
SP SS Covered + PVC
SA SS Covered + SS Armoured
SAP SS Covered + SS Armoured + PVC
N Not Applicable for GDT-SW-R type.
In meter,
up to 5 Mtr max
CONNECTION
SIZETYPEMALE/FEMALEMETRIC THREADS
6¼ inchNTNPTM Male18 M – M 18 * 1.5
103/8 inchBPBSPF Female20 M – M 20 * 1.5
15½inchBTBSPT24 M – M 24 * 1.5
20¾ inchPFPFXX- Any other
251 inchGSGas
NSNPS
RANGE**0 to 850
UNITDegree Celsius, Degree Fahrenheit
OPTIONAThermo well
CColour Band
DDual Scale
E1 SPST
F2 SPST
G1 SPDT
H2 SPDT
RRelay
FAFlame Proof Case (IIA, IIB)
FCFlame Proof Case (IIC)
* Die Cast with Aluminium casing is available only for the Flameproof Version..** Ranges mentioned are in °C. An Equivalent unit in °F scale is issued on request
Ordering Information

Digital Display Thermometer / Indicator

The Digital / Wireless Thermometer range is replaced by digital temperature gauges. These digital gauges are contemporary more superior in technology.

Features:

  • Universal RTD or Thermocouple input.
  • BATTERY Powered.
  • USB & NFC Interface for easy data transfer.
  • Alarm or Relay configured to indicate lower battery status .
  • User set display messaging.
  • 5000 Point data logging along with Real-time clock.
  • This is not only a temperature-displaying unit. 
  • It functions as a data logger to download the information by using an android application.
  • It displays information such as over temperature and low battery.

DM-650TMSCH4: Digital Display with IP67 Plastic Housing:

  • This consists of a battery-powered indicator 6-digit LCD to display sensor temperature in Degrees Celsius and in Degrees Fahrenheit scale.
  • It allows the user to display up to two messages of up to 32 characters.
  • the user has the option to set an alarm within a temperature range.
  • The translation relay is used together with messaging and alerts to provide switching at user-set switch points.
  • Data logger to store up to 5000 points.
  • Feature highlights include relay trips, data logging functions, and battery-powered and real-time clocks.

DM-650 TMSS: Digital Display with Stainless Steel Housing:

  • It consists of stainless steel housing, best suited for rough climatic conditions. It also includes a DUAL relay. The two transition relay is used together with messaging and alerts to provide switching at user-set switch points.
  • Feature highlights include dual relays, a data logging function, battery-powered, real-time clock (great for stamping data logged points).

DM-650TMSSF: Digital Display with Stainless Steel body and panel for Wall Mounting:

This indicator features all of the above functions. The addition is a Stainless Steel mounting panel that can be used for an application requiring the indicator to be fixed on a wall or panel.

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