Instruments Industries Pvt . Ltd Nehru Place, Delhi

Such Type of thermocouples are ideal for the reliable measurement of tube wall temperatures in fired heaters which is important for prolonging tube life and ensuring safe and efficient operation. The Tube temperature Thermocouple is designed to be responsive to tube wall temperature by placing the thermo-junction in fused contact with the tube wall thus providing a direct and total metallic heat transfer path from the sheath to the Tube wall. Such type of thermocouples provides better accuracy, superior reliability, improved longevity and ease of installation . Tube or Skin type thermocouples can be designed and factory formed to suit nearly any installation or application based on the clients requirement.

A Thermowell is a protective enclosure for Temperature Gauges and Temperature Sensors ( Inserts), which enhance the life of the Inserts from the corrosive and abrasive( harsh) service conditions at the installation point without affecting the performance of the Temperature Sensors or Gauges. A Thermowell allows the temperature sensor to be removed and replaced without compromising either the ambient region or the process. We at Goa Instruments, strive to provide Thermowells, which suit the Process Parameters like Pressure, Temperature, Density, Viscosity, and Velocity in accordance with International PTC Standards.   Three Major Types of Thermowells. Using Bar Bar Stock Flanged Bar Stock Threaded Bar Stock Weld In   Using Pipe & Bar Fabricated Flanged Fabricated Threaded Fabricated Weld In Bar Stock Thermowells are offered for Insertion Lengths up to 600mm as a Standard. Insertion Lengths can also be provided up to 900mm in Bar Stock if required. Fabricated Thermowells are generally preferred for Insertion Lengths above 600mm. We have a IN HOUSE Wake Frequency Calculator , in accordance with ASME PTC 19.3 TW-2010 for determining the Insertion Length and the Type of Construction best suited for the Process Parameters as required by the Client. Our extensive internal database, on material selection, for the Thermowells ,assist us in recommending and suggesting a suitable MOC for the product which will bring out the Optimum performance of the Thermowells under the process parameters and different types of Process Fluids. We also offer Thermowells with Sleeves, Coatings and Linings customized to suit the Client’s requirements. Thermowells with more than one material as MOC can also be offered for minimizing cost and improving the efficiency, response and longetivity of the Thermowell under harsh and corrosive conditions.

Such types of Pressure gauges are designed to be used in Process Industries where safety requirements are of prime importance. They are strategically designed with a solid front and a Blow out back which is detached from the assembly in case of the Bourdon Rupture, which can happen due to excess pressure developed in the system.   Features Ingress Protection class IP-67Safety Pattern (Solid Metallic Front)Micrometer PointerAll Components in Stainless Steel.

Thermocouples are generally used with an outer protecting tube or pocket / thermowell to protect it from corrosive process conditions. This improves the life of the thermocouple. However, response time is compromised. To overcome above problem, MI Thickwall Thermocouple are designed having thicker wall with relatively larger conductor diameters. This construction enables the user to insert the thermocouple directly in the process medium without a protecting tube or pocket/ thermowell, thus improving the response time to a great extent in some process conditions. Thickwall thermocouple offers high performance and longer life in harsh process environments, providing improved resistance to temperature, vibration, impact, corrosion and abrasion. These type of thermocouples, are very well suited to harsh, high temperature process environments such as incinerators, heat treatment furnaces and industrial ovens, and hence can be used effectively for measuring the temperature of molten metal also. In such type, the gap between the element and the thick wall sheath is densely filled with high purity magnesium oxide (MgO), which prevents any residual air from penetrating the sheath and enables the product to withstand severe conditions, providing excellent corrosion and heat resistance. This enables faster response times compared to conventional standard thermocouple assembly.. The thermocouple element is protected by the thick wall sheath and high purity magnesium oxide, which can be supplied in large diameters with a very thick wall sheath providing a high resistance to vibration and impact shocks

A thermocouple is a device that is used for measuring temperature. It basically consists of two dissimilar metals , that are joined to form a junction, which when heated ,produce a thermoelectric voltage. This voltage changes as the temperature increases or decreases. Thermocouples are self powered and require no external form of excitation. Thermocouples are widely used in science and industry applications include, temperature measurement for kilns, gas turbine exhaust, diesel engines, and other industrial processes

A Resistance Temperature Detector (RTD) senses heat, based on the principle, that a change in temperature, results in a corresponding change in the resistance of a wire. A small excitation current is passed along the element, the resultant voltage is measured and converted to units of temperature. RTDs have achieved a well deserved reputation in various Industries for their superior stability and accuracy. The result makes these devices well suited for a wide variety of applications.

Mercury filled system based on mercury expansion principle is used for measuring temperature ranging from (-) 40°C to 650°C. It has faster response and the same is available in rigid stem as well as capillary type for remote sensing. Every angle type can be offered in all SS construction. Manufactured in accordance with BS:5235. System is case compensated as standard (SAMA Cl VB). Fully compensated (capillary compensation), Double Bourdon system is also offered wherever essential.   Features Rugged constructionRigid stem or capillary typeFast responseProtection class IP- 67Accuracy ± 1% FSDHigh repeatability, low hysteresisCase compensated systemMicrometer Pointer for Reset

Liquid filled system based on liquid (other than mercury) expansion principle is used for measuring temperature ranging from (-) 30°C to 250°C. It has faster response and the same is available in rigid stem as well as capillary type for remote sensing. Every angle type can be offered in all SS construction. Generally used where mercury type thermometer is not used in industries such as Food, Pharmaceutical, etc. The main advantage is its minimum immersion length required for sensing (as low as 30mm suffices for proper sensing thereby making it ideal for installing in lower line sizes) Features Rugged constructionRigid stem or capillary typeSuitable for pharmaceutical, food, biotechnology industry.Protection class IP-67Accuracy ± 1% FSDMinimum immersion length (as low as 30mm suitable for lower line sizes) possible. Case compensated system (SAMA Cl. IB)

Indicating temperature switch combines indication with switching (in order to make or break the associated electrical circuit). Can be offered with contact assembly as well as microswitch assembly (as a combination of switch and movement)   Features Combination of indication and switchingFast responseChoice of contact assembly or microswitchSwitching accuracy ± 2%FSDHigh repeatability and low hysteresisCase compensated system

A Indicating Pressure Switch is a form of switch that closes an electrical contact when a certain set pressure has been reached on its input. It offers a dual advantage of Indication and Switching. The switch may be designed to make contact either on pressure rise or on pressure fall. Because of their robust design, they are suitable for harsh environment and most corrosive media and meet stringent demands to bring the advantages of high accuracy, long term stability and protection against water jets and dust on their moving parts.   Features Reliable and accurate multi-stage Pressure SwitchesDual Performance of Indication and SwitchLow HysterisisFlameproof or Weatherproof Housing

These types of Gauges are Specifically designed to be crevice free with flush diaphragms for all hygienic applications. They contain no filling fluid which would contaminate the process, should a failure of the unit occur. Complying with the most stringent of hygiene regulations, it is available with a full range of connections and operating pressures.

High Temperature Thermocouples are especially designed for the temperature range from 600 °C upto 1600 °C. Noble metal thermocouples (also called rare metal thermocouples) are used to make the thermocouples. The most common types are R, S & B rare metal thermocouple assemblies. Major Applications include,Glass Industry,Steel Plants, electric arc furnace etc.

Gas filled temperature gauge overcomes most of the limitations of other members of family. It is offered in a very wide temperature range i.e. (-)200 to 800°C. Practically any stem length can be offered and capillary length as long as 25 Mtrs without any loss of accuracy. Inert, non hazardous, non toxic nature of the gas filled system makes it virtually ideal choice of cross section of industries.   Features Use of inert gas – N2Suitable for sanitary applicationAll SS constructionRigid stem or capillary typeFast responseNon-polluting, environment friendlyNon-hazardous for the serviceHigh reliabilityIP-67 protectionAccuracy ± 1% FSD

Flameproof Indicating temperature switch combines indication with switching (in order to make or break the associated electrical circuit). Can be offered with microswitch assembly (as a combination of switch and movement)   Features Combination of indication and switchingFast responseSwitching accuracy ± 2% FSDHigh repeatability and low hysteresisFlameproof housingCase compensated system

Such type of Gauges are mostly preferred, where pressures are low, thereby eliminating the use of the Bourdon type due to its insensitivity. In such a assembly, the sensing component is a diaphragm, which is connected to the movement assembly through a ‘Ball & Socket’ arrangement. The Pressure to be measured is transmitted through this Diaphragm to the transmission shaft. The diaphragm offers dual advantage in such type of assembly. Along with increased sensitivity for low pressure measurement it also serves as an Isolation between the process medium and the pressure sensing element.  

A Chemical ( diaphragm) seal is a flexible membrane that seals and isolates an enclosure. The flexible nature of this seal allows pressure effects to cross the barrier but not the material being contained. Common uses for chemical (diaphragm) PG seals are to protect pressure sensors from the fluid whose pressure is being measured.

Such types of Pressure gauges are used for low pressure measurement, in NON corrosive process mediums. The sensing element is a capsule which is made up of dual SS316L laser welded diaphragms. Such type of gauges are preferred for their Accuracy in low pressure measurement. The unique compact design is highly suitable for use in many Industrial applications where space can be a major constraint.   Features Ingress Protection class IP-67Compact DesignLowest Span with Increased AccuracyAll Internal Components in Stainless Steel

The Bourdon pressure gauge uses the principle that a flattened tube tends to straighten or regain its circular form in cross-section when pressurized. Although this change in cross-section may be hardly noticeable, and thus involving moderate stresses within the elastic range of easily workable materials, the strain of the material of the tube is magnified by forming the tube into a C shape or even a helix, such that the entire tube tends to straighten out or uncoil, elastically, as it is pressurized. This type of gauge is equipped to meet most of the Industrial applications.   Features Protection class IP-67Accuracy +/-1% FSD as Standard , ± 0.5% on request22mm A/F SocketUnit Of Measurement- mmWC, kg/cm2, Bar, PSIG, Kpa, mBarRange: (-) 1 to 1000 kg/cm2Compliance to latest EN- 837 StandardMicrometer Pointer for Reset

The Bimetal thermometer employs a bimetal strip in the form of helix, it works on the principle of thermal expansion - two metals having different coefficient of expansions are joined together to form a bimetal. The resultant expansion of bimetal is proportional to temperature that is sensed. Bimetal dial thermometers are simple in construction, but rugged.

The Bimetal thermometer employs a bimetal strip in the form of helix, it works on the principle of thermal expansion - two metals having different coefficient of expansions are joined together to form a bimetal. The resultant expansion of bimetal is proportional to temperature that is sensed. Bimetal dial thermometers are simple in construction, but rugged. They are used for measurement of temperature in most of the industrial applications. They are offered in the range of (-) 50°C to 500°C. With rigid stem having bottom or back entry. It can also be offered in every angle rotatable construction at 180° A   Features Protection class IP-67Accuracy ± 1% FSDFast responseBottom/Back entry, every angle constructionHigh repeatability, low hysteresisHermetically sealed case