We offer pressure gauges that are very commonly used instruments for measurement of pressure in process in almost all type of industries. In this range, we offer

Bourdon Type Pressure Gauges
Bourden type Gauges are used for applications like Air & clear liquids. These can be provided in:

• Various dial sizes - 40 mm to 250 mm
• Process connections - 1/8” up to 1” threaded
• Any type of flanged or Triclover Connections
• From -1 bar (760 mmHg) up to 3000 bar


Diaphragm sealed pressure gauges
Diaphragm sealed gauges are available:

• From 65 mm to 150 mm dial sizes
• Process connection in 1/8” up to ¾” thread end or flange end
• 0 to 1000 bar in Diaphragm gauges.


Shaffer’s Diaphragm Gauges
Shaffer’s Diaphragm Gauges are used in Pharmaceutical companies for application like syrup. Ranges available:
• From - 1 (760 mmHg) up to 25 bar
• Gauges are available in 65 mm, 100 mm and 150 mm dial size
• Process connection in ¼” up to ¾” threaded or flanged


Electrical Contact type Gauges
We provide the combination of pressure gauge and switch called as Electrical Contact Gauge. These Electrical Contacts are provided for the range:

• Up to 1000 bar
• Dial sizes in 100 and 150 mm.


Master Gauges & Test gauges
Master gauges and Test Gauges are used only in the applications like the process requires very high accuracy in readings of pressure gauges like 0.5% bar , 0.25% FSD. These gauges are available in:

• Dial size of 150 mm and 250 mm with mirror scale


Remote Sealed gauges
Remote Diaphragm Sealed Gauges can be provided in the process tapping is away from location. These are also used when process temperature is high.

We offer vaccum guages that are very commonly used instruments for measurement of pressure in process in almost all type of industries. In this range, we offer

• Bourdon type Pressure Gauges
• Diaphragm sealed pressure gauges
• Shaffer’s Diaphragm Gauges
• Electrical Contact type Gauges
• Master Gauges
• Test gauges
• Remote Sealed gauges

We offer pressure & vacuum switches in two categories

• Fixed Differential Pressure Switches
• Adjustable Differential Pressure Switches

These switches are used in various applications where potential free contact is required when the pressure limit exceeds the desired limit.

The switch has a facility to set the gap between higher set value and lower set value.

We have switches available in pressure range of 15 mmwc to 600 bar and vacuum range 50 mmWc to 760 mmHg vacuum. These switches are provided in IP 40, IP 54, IP 65 or flameproof enclosure.

We also offer these pressure & vacuum switches in Aluminium, Brass and SS pressure housing along with Teflon/Neoprene diaphragm.

The pressure transmitter and pressure transducer are used when output in terms of mA or mV is required in proportion to the pressure available in process vessel. These are available with SS 316 wetted parts for a range of few mmWc to 1000 bar in IP 65 as well as flameproof enclosure. These can be provided either blind type or with Digital Readout. We provide then in accuracy of 1%, 0.5%, 0.25% as per customers requirement.

• 0 to 760 mm Hg Vacuum or
• 0 to 500 mmWc up to 0 to 1000 Bar
• Blind type or Digital indicating type
• Excitation - 12 to 36 V DC
• Out put - 4 to 20 mA
• Accuracy +/- 0.25%, 0.5% or 1% FSD
• Casing SS 304 for Blind Transmitter and Industrial Plastic for Indicating Transmitter
• Enclosure - IP 65 or Flameproof
• Internals SS 304, SS 316 or special on request
• Process Connection Threaded or Flanged
• Application - For Indication & Control of Pressure & Vacuum in proportional mode

Differential Pressure Gauges also known as DP gauges works on different types of sensing elements. In this range, we offer:

• Bourden type DP Gauges
• Diaphragm type DP Gauges
• Piston type DP Gauges.

All these gauges are available with varieties of wetted parts like Aluminium, Brass, SS, Industrial Plastic. In addition, we also provide these gauges as per the specific requirement. Available in Analogue or Digital form, these can be provided for a range from 15 mmWc up to 70 bar with Higher Static Pressure up to 300 bar. Our range is used in the application of Filters, filtration systems, HVAC industry, etc.

Our range of differential pressure switches is used in the applications where potential free contact is required when differential pressure cross the desired limit. The contact is provided through Micro Switches or Reed Switches. Available in wetted parts like Aluminium, Brass, SS, Industrial Plastic, we also provide these switches with customized wetted parts. Ranges is available in Differential Pressure Switches such as 15 mmWc up to 70 bar with higher static pressure up to 300 bar. This range is available in IP 40, IP 54, IP 65 and flameproof enclosures. Differential pressure switches are provided in dial sizes like 50 mm, 65 mm, 80 mm, 100 mm and 150 mm. In this range, we offer,

• DP Switch (Two Diaphragm type)
• DP Switch (Single Diaphragm type)
• DP Gauge (Magnetic coupling operated Diaphragm type) with Switch
• DP Gauge (Magnetic coupling operated Piston type) with Switch
• DP Gauge (Bourdon type) with Switch

An important parameter in process industry. Our range of flow meters is used widely in industries like chemical, petrochemical, pharmaceutical, automobile, textile, tile manufacturing, automation, etc. These flow meters are used for conductive fluid, clear water, Oil, Diesel, Petrol applications. Our flow meters is provided with exclusive Floredo, which is battery operated. It provides digital indication of instantaneous flow rate as well as totalized flow. In this range, we offer,

• Turbine Type
• Electromagnetic Type
• Mini flowmeter (Floredo)
• Positive Displacement Type
• Ultrasonic Type (For Liquid through the pipeline)
• Ultrasonic Type (For Liquid through open channel)

For positive detection of fluid flow, Flow Switches are used. Flow Switches are available for liquids & Gases like, water, kerosene, lubricating oils, air etc. Flow Switches are used to ensure availability of desired flow or no flow in your system in order to prevent or to control any disaster in the industry. Magnetically or Micro Switch operated flow switches are available from 6 mm line size. Magnetically operated Flow Switches (Blind Flow Switches, Flow Indicating Switches) are normally used for low flow capacities max. up to 150 LPM. Micro Switch operated Paddle Type Flow Switches are an ideal solution for higher flow rates and bigger line sizes.

• Blind Type Flow Switch
• Paddle Type Flow Switch
• Tubular Glass Type Flow Switch

According to the type of applications, varieties of level switches can be provided. For different types of clear liquids Float type Level Switches or Capacitance type Level Switches, for conductive liquids Conductivity type Level Switches are used. For dry powders and pallets Rotating Paddle type Level Switch or, Vibrating Fork type Level Switches are recommended. RF Admittance Level Switches can be used for dry powders, pallets as well as slurries & pastes. In pharmaceutical Industries and Effluent Treatment plants only Non Contact type Level Switches are allowed. In such applications Ultrasonic Level Switches can be used. Level switches can be provided either side mounted or top mounted. Wetted parts in Level Switches are in Industrial Plastic, PVDF, Teflon, SS 316 or any special as per the customer’s requirement.


Level Switches for Liquid

• Float Type
• Cable Float Type
• Capacitance Type
• Conductivity Type
• Vibrating Fork Type
• Diaphragm Type

Level Switches for Solids

• Vibrating Fork Type
• RF Admittance Type
• Rotating Paddle Type
• Diaphragm Type

Level Switches for Slurry & Pastes

• RF Admittance Type

For different types of applications, specific type of Level Measuring Instruments is used. For liquid Level Indication by Mechanical device, Tubular Glass, Follower type Level Indicator, Bi-color Level Indicators or, float & board type level indicators are used. These Level Instruments can also be provided with preset or, factory settable Level Switches. Float type Level Transmitter (Float type Level Indicators) are used where 4 to 20 mA out put is essential or, level indication is required in Digital display. For non contact type Level measurement Ultrasonic or, Radar type Level Transmitters (Level Indicators) are used.

Mechanical

• Tubular Glass Type Level Indicator
• Follower Type Level Indicator
• Bi-color Type Level Indicator
• Float & Board Type Level Indicator

Digital

• Capacitance Type
• Float Type
• Ultrasonic Type
• Radar Type

For online detection and control of conductivity of fluid in any process industry Conductivity Meters or TDS meters are used. Normally the range required is from 2 to 2000 micro siemens. On-line conductivity indicators with IP-65 plastic enclosure for corrosive or dusty atmosphere as well as Panel mounted controllers for automatic activation of Pumps or alarms with settable relay are available. Applications related to Pharmaceutical as well as cleaning of insulators in power stations.
NK Instruments has availability of not only these but the instruments like Pneumatic Proximity Switches, pH meters and many other Process Control Instruments. Our customers are satisfied as they get all varieties of process control instruments available under one roof. The repeat orders always prove the satisfaction of the clients. We offer perfect solutions to client’s process control expectations. With proper co-ordination and communication we also arrange for perfect solution and fast availability of our instruments & solutions.

• Advantage : Digital Indication of conductivity is possible online.
• Service : For all types of liquids
• Accuracy : 1% FSD
• Working principle : Conductivity
• Mounting : Inline
• Indicator Mounting : Online
• Conductivity Indication : Digital through Head Mounted Indicator
• Range of Conductivity measurement : 0 to 4, 0 to 40, 0 to 100, 0 to 2000 µS/cm
• Sensor MOC : SS 316
• Sensor Rod MOC : PP
• MOC of Inline fitting : ABS
• Process connection: Hose Connection
• Indicator Housing : Weather proof IP 65
• Power Supply : 230 V AC
• Max. Fluid Temp. : up to 60 degree C
• Max. Fluid Pressure : 4 Kg/cm2
• Application : For accurate indication of conductivity of fluid passing through the pipeline

Temperature is probably the most fundamental parameter and is widely used to measure the industrial variable. There are various types of temperature gauges & Indicators such as Bi-metal temperature gauge, Mercury filled temperature gauge (Rigid stem type), Mercury filled temperature gauge (capillary type), Digital temperature Indicators (using the Pt-100 or, RTD sensor). The temperature ranges covered here is from -38 degree C. to 600 degree C. with different mounting styles, and process connections 3/8”, ½” BSP and NPT threads.

• Bimetallic Temperature Gauges
• Mercury Filled Temperature Gauges