The PI controls Tubular Level Indicator (Side Mounted ) is reliable device for reading the level of the liquid in the tank can easily be observed. It is a simplest form of level indicator. These level indicators find wide application for level measurement in process tanks, batching tanks etc.

The Gauge is fitted between two end blocks through gland packings. The gauge is mounted parrallel to tank so as to form a close loop causing tank liquid to seek its level in gauge. Guards are provided in the form of tie - rods / c - channels round the gauge to protect it from accidential blows. End blocks have built - in isolating valve, drian and vent plug.

• Glass Tube: Heavy Walled Borosillicate Glass Side H-19 / 16 Teflon
• End Block MOC: CS / SS 304 / SS 316 / PP / PVDf
• Protective Channel: C.S. Rectangle Channel Box with Powder Coated
• Packing: Teflon
• Connection: Flanged ASA
• Valve: CS / SS 304 / SS 316 / PP / PVDF

• Mounting: Side Operating
• Pressure: Up to 15 kg/cm2
• Operating Temperature: Up to 100 C Up to 4 Meters
• Process Connection: Flanged or Screwed
• C-C Distance ( +- 3 mm ): Up to 4000 mm ( More 4000 mm Please consult Factory )
• Visibilty: C-C Distance - 150 mm

The By-Pass Level indicator is installed outside of a vessel or tank. The liquid level in the tank can easily be observed from the change of the flag color. Optional devices of magnetic switch and level transducer can be added for electrical signal output and level transmitting.

The By-Pass indicator utilizes hydrostatic principle to show the liquid level in the tank. A float with a magnet inside rises and drops accordingly to the liquid level change. Magnetic flags will flip as float passes through to indicate level based on magnetic attraction method.

Reed switches or electrical snap (magnetic pendulum switch) may be mounted on the rail of the level gauge to be activated at high/low levels. The number of switches is only limited by the length of indication rail and the switches can be mounted on the left and right side of the rail. Mounting the level switches is a very easy task.

The analogue transmitter mounts directly to the side of the gauge chamber, providing a continuous 4-20mA output signal proportional to the liquid level with an accuracy of +-3mm. Using simple and reliable reed switches surface mounted to printed circuit board. The transmitter can be equipped with a local indicator to show the level height in a length scale or indicate the percentage of the total height or the tank volume.

The By-Pass Level indicator is installed outside of a vessel or tank. The liquid level in the tank can easily be observed from the change of the flag color. Optional devices of magnetic switch and level transducer can be added for electrical signal output and level transmitting.

The By-Pass indicator utilizes hydrostatic principle to show the liquid level in the tank. A float with a magnet inside rises and drops accordingly to the liquid level change. Magnetic flags will flip as float passes through to indicate level based on magnetic attraction method.

Reed switches or electrical snap (magnetic pendulum switch) may be moulded on the rail of the level gauge to be activated at high/low levels. The number of switches is only limited by the length of indication rail and the switches can be mounted on the left and right side of the rail. Mounting the level switches is a very easy task.

The analouge transmitter mounts directly to the side of the gauge chamber, providing a continuous 4-20mA output signal proportional to the liquid level with an accuracy of +-3mm. Using simple and reliable reed switches surface mounted to printed circuit board. The transmitter can be equipped with a local indicator to show the level height in a lenght scale or indicate the percentage of the total height or the tank volume.

The By-Pass Level indicator is installed outside of a vessel or tank. The liquid level in the tank can easily be observed from the change of the flag color. Optional devices of magnetic witch and level transducer can be added for electrical signal output and level transmitting.

The By-Pass indicator utilizes hydrostatic principle to show the liquid level in the tank. A float with a magnet inside rises and drops accordingly to the liquid level change. Magnetic flags will flip as float passes through to indicate level based on magnetic attraction method.

Reed switches or electrical snap (magnetic pendulum switch) may be moulded on the rail of the level gauge to be activated at high/low levels. The number of switches is only limited by the length of indication rail and the switches can be mounted on the left and right side of the rail. Mounting the level switches is a very easy task.

The analogue transmitter mounts directly to the side of the gauge chamber, providing a continuous 4-20mA output signal proportional to the liquid level with an accuracy of +-3mm. Using simple and reliable reed switches surface mounted to printed circuit board. The transmitter can be equipped with a local indicator to show the level height in a length scale or indicate the percentage of the total height or the tank volume.

The PI Controls Reflex Level indicates are designed for safe and positive visual indication of liquid level in vessels under high pressure and temperature conditions.

The PI Controls Reflex flat glass level indicates has precision moulded prismatic grooves cut on inner surface, which comes in contact with liquid. Light striking on glass portion covered by liquid is reflected (absorbed) making this portion appear BLACK, whereas glass portion covering vapour space reflects light making it appear SILVERY - WHITE. Thus a sharp clear line marks the liquid, eliminating all possibilities of erros in reading.

• Gauge Glass: Tempered soda ash / Borosilicate (30W x 17 mm Thk) / Tempered Borosilicate (34W x 17mm Thk)
• Cushion / Gasket: CAF, CNAF, PTFE, Ss304 Spiral wound with Graphite Filler & Ss316 Spiral wound with Graphite Filler.
• Body (Liquid Chamber): CS, ASTM A-105, SS304, SS316 or PP (CS Reinforced)
• Cover Plate: CS, ASTM A-105, SS304, SS316 or FRP
• Bolts: CS, SS304 or A 193 Gr. B7
• Nuts: CS, SS304 or A 193 Gr. B7
• Process Connection Orientation: Rear / Rear or left / Left or Right /Right or Veritical / Vertical
• Isolation Valves: Offset needle valve x auto ball check x screwed bonnet (85 Kg /cm2) / Union bonnet (165 kg/cm2) / Bolted bonnet (210 kg/cm2)
• Vent: 1/2” NPT (BSP for PP / TEFLON MOC) plug / valve (Ball, Needle, Diaphragm, Globe, Gate as required)
• Drain: 1/2” NPT (BSP for PP / TEFLON MOC) plug/ valve (Ball, Needle, Diaphragm, Globe, Gate as required)
• Calibrated Scale: Polycarbonate / SS304 / Aluminum
• Special Features:
• Frost Free extn: Perspex sheild with extension of 30 mm.
• Jacketing: Enclosure Cast AI, WP IP 65 or Ex-Proof Gr. IIA & IIB or IIC
• None: Longer C-C Distance are provided in 2 chambers coupled with flange coupler

The PI Controls Transparent Level indicates are designed for safe and positive visual indication of liquid level in vessels under high pressure and temperature conditions.

The PI Controls Transparent flat glass level indicators is a clear glass for visual indication and specially for interface services or where the liquidis dirty or viscous. Light striking on glass portion covered by liquid is reflected (absorbed ) making this portionappear BLACK, whereas glass portion covereing vapoour space reflects light making it appear - WHITE athus a sharp clear line marks the liquid, eliminating all possibilities of error in reading.

• Low Pressure: 30 Kg/cm2
• Medium Pressure: 65 Kg/cm2
• High Pressure: 100 Kg/cm2
• Gauge Glass: Tempered soda ash / Borosilicate ( 30W x 17 mm Thk ) / Tempered Borosilicate ( 34W x 17mm Thk )
• Cushion / Gasket: CAF, CNAF, PTFE, Ss304 Spiral wound with Graphite Filler & Ss316 Spiral wound with Graphite Filler.
• Body ( Liquid Chamber ): CS, ASTM A - 105, SS304, SS316 or PP ( CS Reinforced)
• Cover Plate: CS, ASTM A-105, SS304, SS316 or PP ( CS Reinforced)
• Bolts: CS, SS304 or A 193 Gr. B7
• Nuts: CS, SS304 or A 193 Gr. B7 Process Connection Orientation: Rear / Rear or left / Left or Right /Right or Veritical / Vertical
• Isolation Valves: Offset needle valve x auto ball check x screwed bonnet ( 85 Kg /cm2 ) / Union bonnet ( 165 kg/cm2) / Bolted bonnet ( 210 kg/cm2 )

The Welded Pad Type Level indicators are used where conventional gauge and valve construction is impractical because of solid matter in suspension, under conditions where the thermal error caused by piping to a gauge glass cannot tolerate or where space requirements suggest their use. Included are applications involving high vibration, highly viscous liquids or liquids with considerable amounts of solid...

The Welded Pad Type Level Indicator unit is designed to be welded directly onto a tank or other liquid containing vessel. Standard Liquid Level Gauge units are furnished with a flat bottom. Upon request the unit can be machined with a cylinderical radius to match the contour of the vessel.

The Liquid Level Gauges are avilabe in single or multiple types.

The Float Board Level Indicators are designed for an accurate, reliable and trouble free float operated technique used in large non-pressurized storage tanks.

1) Guided & Direct Indication
The Float & Board Level Indicators consits of a float connected to a pointer through a rope via a set of pulleys. The pointer glides over a calibrated gauge board, positioned parallel to the tank. The float accurately follows liquid level variations in vertical direction. The horizontal float movement is restricted by two guide wires firmly anchored to tank bottom. As such, the pointer in the TOP POSITION when tank is EMPTY and in BOTTOM POSITION when FULL

2) Unguided and Direct Indication
Construction for this type of Float & Board Level Indicators is smiliar to the above, except guide wires are not provided, as the horizontal float movement is negligible.

• Measuring Range: 7.5 mtrs. with ø200mm float
• Float: Upto 20 mtrs. with ø350 mm
• Calibrated Gauge Board: SS316 x ø200 & ø350mm
• Low Pressure: PP x ø200mm
• Medium Pressure: 6” wide x AI white powder coating with black graduations and numericals
• Least count: 5mm
• Maximum Temperature: 80 °C ( PP) / 150 °C (SS)
• Maximum Pressure: 5Kg/cm2
• Float Wire Rope: Ø1.6mm x SS 316 / SS 304 multistrand)/ Ø3mm xPP (multistrand) Guide Wire Rope: Ø 1.6mm x SS 316 / SS 304 (multistrand) / Ø3mm xPP (multistrand)
• Installation: Grounded Level Tank / Underground Tank ( sump ) / Overhead Tank
• Specific Gravity of Fluid: 0.75
• Connection Pipe: Carbon Steel Powder Coated

The Top Mounted Level Switch is an established and reliable technique in industry for single or multiple liquid level sensing and control in open or pressurized vessels. It offers trouble free service in conductive and non- conductive liquids under widely varying temperatures, pressure, liquid viscosity and corrosive conditions, Besides it provides high repeatability, and effects of shocks or variations are minimal.

The Top Mounted Level Switch has a simple & study construction consisting of a float and guide tube, made of nonmagnetic material to achieve un-distributed magnetic flux. The float has a magnetic system within it and moves freely along the guide tube, which contains glass encapsulated hermetically sealed reed switches, located at preset positions. Float follows liquid level and magnetically actuates reed switch at preset positions to give a change over contact. Single or multiple switching is effected through single or multiple floats as required by application. Mounted internally or extremely through a external chamber. External mounting is adopted to overcome limited space within the tank or where mechanical devices like stirrers operate or where isolation tank is required for regular servicing. It can be mounted vertically from top. The level switch can be wired directly in series to operate electrical loads like audio or alarm, annunciation, mimic indication, which match the low swtiching capacity of reed contacts. However, high loads like contactor, solenoid or motorised valve should be connected thorugh a level controller to prevent overloading by surge or inrush current and isolate reed contacts from the electrical power system, to ensure their long life.

Side Mounted Magnetic Level Switch is an economical free and reliable device used for high, low and intermediate point level switching. It is used for tanks with inaccessible tops or bottoms and where insertion depths of top mounted models exceeded.

The Side Mounted Magnetic Level Switch has a compact & rugged construction, consisting of a free moving pivoted float assembly and a switch enclosure in non magnetic material to achieve undisturbed magnetic flux. It employs dual magnetics, one carried by the float arm and other by contact carries housed in switch enclosure. A change in liquid level brings the like poles of dual magnets opposite to each other and resulting repulsion force ensures a changeover of contacts with snap action. The magnetic transmission is glandless, leaving no scope for leakages from vessel into switch housing. These switches are manufactured in various materials, enclosure and special features to suit broad range of media and applications. They are designed to provide high repeatability and to minimise effects of shock, vibration and pressure.

Top Mounted Mini Level Switch
The top mounted Level Switch has a simple & sturdy construction, consisting of a float and guide tube, made of nonmagnetic material to achieve un-disturbed magnetic flux. The float has a magnet system within it and moves freely along the guide tube which contains glass encapsulated hermetically sealed reed switches located at present positions. Float flows liquid level and magnetically actuates reed switch at preset positions to gives change over contact. Single swicthing is available through single float depending float size and switch construction. It can be mounted vertically from top and can be extended through an extension pipe for low level switching or alternatively switch can be mounted through an elbow.

Side Mounted Mini Level Switch
The Side Mounted mini switches are installed horizontally and can be mounted vertically for some applications like flow detection. The switch action can be reversed by reorientation of the mounting. The level switch can be wired directly in series to operate electrical loads like audio or alarm, annunciation, mimic indication, which match the low sitching capacity of reed contacts. However, high loads like contractor, solenoid or motorized valve should be connected through a level controller to prevent overloading by surge or inrush current and isolate reed contacts from the electrical power system, to ensure their long life.

• Float Protection WP - IP-68
• Terminal Enclosure Cast Aluminum, WP IP-66
• Cable Gland Brass
• Process Connection Flanged x 1”, 1-1/2”, 2-1/2”, 3”, 4” NB, 150#
• Integral Cable Length 2,3,5,6,8,10,15 & 20 meters (Larger lengths on request )
• Contact Type Microswitch (SPDT)
• MOC of Float Polypropylene
• MOC of Counter Weight Polypropylene
• MOC of Cable Neoprene x 10 mm2
• Min. Liquid Specific Gravity 0.75
• Adjustable Stopper Polypropylene
• Support Pipe SS304 / Polypropylene
• Suspended Ballast SS304 / Polypropylene with PVC insulated SS304 rope
• Shape Disc
• Differential Angle 28
• Max. Operating Pressure 2 Kg/cm2
• Max. Operating Temperature -10 °C to 70 °C
• Switch Rating 8A, 250 VA°C
• Service Clear or Dirty Water

• 02 = 2 Meter
• 03 = 3 Meter
• 05 = 5 Meter
• 06 = 6 Meter
• 08 = 8 Meter
• 10 = 10 Meter
• 15 = 15 Meter
• 20 = 20 Meter
• XX = Non Standard

PI series of radar level meter adopted high frequency radar sensor, the maximum measurement range can reach up to 70 meters. ®®Antenna is optimized further processing, the new fast microprocessors have higher speed and efficiency can be done signal analysis, the instrumentation can be used for reactor, solid silo and very complex measurement environment.

• 2-wire compact transmitter
• 26 GHz (K-band) measuring signal
• Non-contact level metering
• Accuracy up to ±3 mm
• Measuring range up to 23 m
• Plug-in graphic display module
• HART communication
• 99-point linearization
• Plastic, aluminum or stainless steel housing
• Stainless steel horn or plastic enclosed antenna
• High temperature range
• IP 67 protection
• Explosion-proof models

Level measurement of liquids, slurries, emulsions and other chemicals Water and wastewater industry Pharmaceutical industry, chemical industry Food-industry, energy-industry For high precision level measurement tasks.

ULT for liquid level measurement in sumps or tanks, for tank contents measurement, or open hannel flow measurement, this transmitter provides the answer. Installed on the tank roof, or above the iquid surface to be measured, the transmitters give analogue output proportional to liquid level or transmit HART digital data. It is an intelligent compact ultrasonic level transmitter with 4-20 mA output offering HART protocol as option. The unit is tank-top mountable only. This is an integrated, blind transmitter with equal measuring performance but readable and programmable remotely only through HART protocol coming as standard.

• 2- or 4-wire compact transmitters
• Non-contact level metering
• Narrow 5° beam angle
• Fully temperature compensated
• Excellent signal processing via QUEST + software
• PP, PVDF, PTFE, stainless steel or foam faced transducers Opional field indicator and plug-in programmer/display
• Optional switching relay
• Built-in Data Logger
• Plastic or Aluminum housing
• [ HART]
• Secondary lightning protection
• Explosion-proof models

Almost any liquids Level, volume and open channel flow measurement Reliable measurement in challenging applications such as vapour/fume, stirrer, foam with liquids®

ZTD series smart displacer level (interface) transmitter (hereinafter called ZTD) is joint manufactured by PI Controls Ltd and Fisher Controls Company. ZTD-G is multi-purpose transmitter designed for measuring level, interface, or density. Having multiple function, durability, stability, and cost-effective properties, it’s welcomed by customers in petroleum line for tank, vessel or process control, etc.

Measuring element of displacer level controller is ball float or displacer, measuring element connected with magnet tube. When level raised, magnet tube moves up and enters external magnetic field. Through magnet induction effect or magnet coupling effect, the magnet controlling switch or offset magnet steel is pulled and makes switch contact on or off. When level goes down, the magnet tube moves down and goes out off the external magnet field. Then the magnetic controlling switch backs to the original state of the offset magnet steel goes down back to new balance position under the action of self-weight, and then makes switch contact on or off. In this way, it realizes level controlling and alarming.