Mahalaxmi Instruments Dahisar, Mumbai, Maharashtra

Vibrating fork level switch consists of two forks or two arms which vibrate continuously because of their contact with piezo electric crystals. Hence the name vibrating fork. The tuning fork vibrates at its mechanical resonance frequency of about 1000 Hz. The frequency changes when the fork is covered by the medium. This change is detected by the integrated oscillator and converted into an output – Relay, PNP or analog. The material could be a viscous liquid, slurry or even free flowing powders. (Contact our technical team to help you decide the type of fork to be used.) Features : Compact size, rugged design Proven Technology No Calibration required Universal power supply 230VAC & 11-55VDC on our selected models. Suitable for all types of solids, powders, liquids and viscosity upto 10,000cp Can offer for high temperature and high pressure applications (on request) Suitable for hazardous area Unaffected by flow, bubbles, turbulence, foam, solid contents etc. No moving parts, maintenance free. Custom length available.   Application : Pharmaceuticals Pulp & Paper Processing Food & Beverages. Rocks, Sand & Gravels. Dairy Mining Plastics

Mahalaxmi make Ultrasonic Level transmitters are widely used to measure and control level of Solids and Liquids or distance of any objects. The sensor generates ultrasonic sound waves.From the time taken for the sound waves to strike the target and returnmthe Electronics computes the distance of the object and displays it in terms of distance or level-In millimeter,ln litres or a current signal of 4 to 20mA proportional to the level. The transmitter output may be connected to a PLC,Controller etc for Indication or/ and Control of level. Special electronics filter enables detection of largest target,automatically eliminating false echoes and rejecting noise clutter efficiently. Salient Features : Sensor Module imported from USA. Over Voltage/Surge Voltage protection. Reverse polarity protection. Direct or reverse action i.e.,4 to 20 mA or 20 to 4 mA selectable at site suitable for distance or level measurement. Power supply- 24 VDC Output: 4 to 20 mA, 3-wire & Rs485. Alpha-numeric LCD display. LCD Screen- 8 x 2 alphanumeric display green or Blue screen Push-Button Teach-in facility. Narrow beam angle of 10 degrees. Range 300 to 5000mm , 300 to 10000 mm. Dead Zone- 300mm Built-in Temperature compensation. LED Indication for Over current or under current Resolution-5 mm or 10mm depending on Models. Accuracy: + 0.25% FSD Updation Time- 150 mS. Power consumption- 1.5 Watts. Operating Temperature Range: - 4 to + 65 deg C. Enclosure: Blue Powder coated cast aluminium Flameproof or weather proof enclosure with front glass window or without glass window/Stainless Steel AISI 304 weather proof. Mounting: Flanged or Threaded to 2" ASA 150 Lbs Rf or 2"BSP(Male) or as required.

Description : Since the signals generated by thermocouples or resistance sensors are low on emf and resistance, they can be transmitted over a short distance using compensating and three wire cables, without the loss of signal strength and accuracy. However, to transmit signals over very long distance without loss of accuracy, Two Wire loop transmitters are widely used. The low level signal converted to 4-20mA current output can be transmitted over long distance using a pair of normal copperwire. Accuracy of output current shall be independent of the lead resistance and length of the cable. The transmitter, fits directly into standard terminal head both weather proof or Ex-proof. Application : For converting thermocouple or Pt-100 or resistance signal to equivalent 4-20mA signal for long distance transmission.

Output : (4-20)mA, two wire and loop powered (calibrated linearly to the input signal)

Utilising the basic principle of - liquids find their level - tubular level gauges have been the most preferred and economical means of direct liquid level indication since time immemorial. Various means of glass tube protections- 3 plate glass protection, 3 guard rods, pipe guard or C-channel protections are in popular use. Our level gauges have C-channel protection of 2 mm thick sheet metal, making it robust and sturdy. A black powder coated aluminium engraved scale with white numerals & markings is provided for indication of the level of liquid in millimeter or Litres as required. Scale shall have minimum graduation of 5 mm. Process connections can be threaded or flanged to customer specifications. Isolating cock valves/needle valves or isolating needle valves with safety ball-check protection to prevent spilling/leakage by automatic shut-off in the event of glass tube breakage- are optional features.

Features : The instrument consists of a microswitch inside a cast aluminium box, covered by a flexible membrane of neoprene or silicon rubber. Operation : The device must be mounted so that the flexible membrane is exposed to the product whose level should be controlled in such a way that the product, if present, can press the membrane. When this membrane becomes covered up by the product, it moves under the product pressure, thereby working the microswitch. The device must be connected to control signal or to mechanisms driving the product transportation systems, like feeding, unloading ,etc.   Application : Switch has a buoyancy which guarantees smooth, trouble-free operation under all conditions. The switch has double chamber and a final remoulding finish to make it absolutely hermetic.   Installation : "MAHALAXMI" MODEL DLS-AL-ND (with neoprene diaphragm) or DLS-AL-SD (with silicon rubber diaphragm) level switch is used for indicating, controlling, and regulating the level of granulated or powdered dry materials with a grain diameter up to 30mm and a density of 0.3 to 2.5 g/cm3, flowing through a silo, hopper or conduit.

Mahalaxmi make magnetic level gauge consists of a float chamber, a float and an external indicator assembly. The float chamber is basically a column of 2" or 2.1/2" NB pipe with process connection to suit that of storage ta nk. The float moves up and down inside the float chamber as per the liquid level. Contained inside the float is a very strong and powerful ring magnet. Follower Type: A borosilicate indicator glass tube and scale assembly is attached to the outside of the float chamber. Inside the glass tube is a red coloured indicator containing a magnet. When the float moves up or down, due to magnetic coupling the red colour indicator also moves along with that indicating the liquid level. The Roller Type: Indicator consists of a series of magnets which are coloured red on one side and white on the other side. As the magnetic float passes the magnets rotate through 180 degrees to show the other colour-red indicating liquid space and white vapour. Non-Invasive Switches: In this case the electric contacts are actuated by the magnetic float when it moves as per liquid level. These switches provide a low cost, reliable alarm and control action without making additional cut-outs in the vessel. The externally adjustable mounting arrangement make it easy to adjust the set point or service the switch anytime without interrupting the process. Salient Features : No Power Consumption . Will not be affected by power failure. A level transmitter or magnetic switch can be installed and adjusted without disturbing the process. 360 degree magnetic-flux field provides constant interaction with roller assembly in turbulent liquids. Roller channel and outer housing is of black powder coated aluminium. Outer housing in stainless steel as optional. Rollers are of glass filled Nylon / ABS plastic. Rollers move on Delrin bush bearings. Delrin is a self lubricating type material and hence movement will be frictionless, thus ensuring long life. Front window is of crystal clear acrylic. Acrylic windows has a U-gasket i.e. double gasket-gasket on top & bottom side ensuring perfect sealing on both side. Compact, rugged and field proven. In our level gauges the primary magnet attached to float is 360 degree rare earth. Rare Earth magnet has an unusually high energy output and is highly resistant to demagnetization, they will not demagnetize at high temperatures like ceramic magnets.   Application : Applicable in environment with high temp., high pressure, strong acid, strong alkaline and hazardous locations. Multiple applications for textile dyeing, sewage water processing, power generating, boiler and petrochemical industries.    

Salient Features : “MAHALAXMI MAKE” Float & Board Type Level Indicators are used for accurate Liquid Level Gauging of 􀃶xed roof tanks storing oil, water, solvents and other products. The units are designed for simple, easy installation for “Tanks-in-Service” or “ Tanks - out - service” and to provide a maximum of trouble free service. The Indicators are specially recommended for application requiring a low cost, low maintenance method for liquid level gauging and where operations necessitate accuracy to 25 mm +/-. The Indicators are 􀃸oat - operated with a steel target that runs vertically up and down, registering tank contents on a calibrated board that is mounted outside of the tank for quick convenient readings.   Mterial of Constructions : The sturdy design and stainless steel construction of the float is resistant to the corrosive effects of petroleum products and assures a long dependable use. In addition to the float assembly, the 􀃸oat cable, guide wires and Indicator target guide wires are of Stainless Steel. The target assembly and fitting are of galvanized steel. The Gauge board is constructed of aluminium and has bold, legible markings in MM or CM with easy-to-read numerals every MM or CM. Stainless Steel gauges are also available on special order. The Level Gauge is also available in PP & PVC construction for HCL tanks.

"MAHALAXMI" make model MLS - 04 / MLS -16 magnetic level switches work on the principle of magnetic repulsion and therefore they are glandless and leak proof instruments. A permanent magnet fitted in the tail piece of the float repels another magnet inside the switch housing which in turn operates an SPDT microswitch. Microswitch contacts can be utilized for initiating audio-visual signals or pump control. Salient Features : As our switches work on magnetic repulsion principle, they are glandless and leak proof. No power consumption. Internal assembly wirings are teflon insulated. Internal switch assembly bracket is of cast aluminium. Practically no maintenance is required except periodic cleaning. Suitable for 2.5" (65 mm) NB nozzle mounting, (for 63 mm dia float) and 2 " (51 MM) NB nozzle for 48 mm dia float. Maximum working temperature 250°C. (Process Temperature) Contact ratings of MICROSWITCH 5 AMPS at 230 VAC Resistive. Also available with Microswitich having current rating 10 A at 230 VAC Resistive. No of contacts : 1 change over as standard. Optional - 2 change over For high temperature upto 350°C (Process temperature) 1 number SPDT Reed switch with current rating 100 VA, max. switching current 5 Amps, max, switching voltage 230 VAC / 200 VDC Specific Gravity : Down to 0.75   NOTE : Flanged connections as per ASA/BS/DIN or JIS available on request, as per customer requirement.   Caution : Level Switches should not be used for direct starting / stopping of pumps. An external relay or contractor must always be used with the level switch. MLS-04/MLS-16 side mounted level switches must always be mounted horizontally with outgoing cable entry facing downwards. In case of high temperature Model MLS-04-92 HT/MLS-16-92HT and Low Temperature Models SMT-04-F82 and SMT- 04-F92 arc suppressors/current limiting bias resistor must be provided depending on the load viz inductive or lamp load etc. to reduce the deteriorating effect of contacts due to surge voltages and high in-rush current.   Dimension Models : (MLS - 04 - F 82) & (MLS - 16 - F 82) (MLS - 04 - F 92 S) & (MLS - 04 - F 92 ) & (MLS - 16 - F92 S) & (MLS - 16 - F 92)   L=165mm, g=80mm, with d=49mm f Float.* Applicable only for model MLS - 04/16 - F92, when 62 mm dia float is used,L=240mm, g=135mm, with d=62mm f ALL DIMENSIONS ARE IN MILLIMETRE (TOLERANCE - ± 2 MM) Technical Specification : Mahalaxmi make Model (MLS-04-F82) or (MLS-04-F92S) side mounted magnetic Level Switch.Process connection- 82 or 92mm square flange with 4 bolt holes of 10/14mm dia on 82 or 92mm PCD respectively. Matenal of construction of flange, brackets, fulcrum screws, body and cover-SS 304(For wetted parts in SS 316 please denote by 16 instead of 04 in the Model). SS 316L float. 1 no SPDT microswitch having current rating 5 Amps at 230 VAC resistive. Differential between make and break-10mm approximately.Maximum working pressure 10 kg/sq.cm and temperature 250 deg C.Specific gravity down to 0.7.Cable entry neoprene gromet. Supplied with 1.5 Metre long 3-core PVC Cable.   NB : In case of Model MLS-04-F92 flange size shall be 120 mm dia round flange with 4 bolt holes of 14 mm on 92 PCD.   Optional : Microswitch with current rating 10 Amps at 230 VAC res. Adjustable differential upto approx-250 mm With 2 microswitches i.e., 2NO + 2NC

A capacitance is formed between the probe and the vessel wall .As the level of the measuring medium rises or falls capacitance between the probe and vessel wall changes proportionately. A high frequency sine wave is applied between the probe and tank wall. A change of medium level will induce a change in the current of the applied sine wave. From  when the capacitance in the vessel increase, impedance will decrease and current will increase and vice-versa. (Z=Resistance, C=Capacitance, F= Frequency)   Head mounted electronics converts the capacitance variation to 4-20mA signal for long distance transmission. It is provided with trimpots for SPAN and ZERO adjustments. With no moving parts it is free from wear and tear, rugged and robust in construction. No dead zone like float based instruments. It must be ensured that the probe is parallel to the tank wall throughout it's length. While sending enquiries for capacitance type level transmitters, please furnish following informations to enable us to submit a suitable offer: Name of service Medium/Liquid Dielectric constant of the medium. Operating Temperature and pressure. Does the temperature vary? If so how much? Nature of liquid - Foaming, Viscous, Sticky etc. If agitation is involved whether sufficient space is available for probe between agitator and tank wall to avoid damage. Material of tank - Metallic or Non- Metallic If mounted on nozzle, height of nozzle, with tank dimensions and drawings.  

Accuracy : ±0.5%, ±1% or ±2%

"MAHALAXMI" make cable float switch is a control device for filling and discharging pumps, motor and magnetic valves. It is also an alarm device at certain pre-determined surface levels. It is suitable for use in non-flammable liquids at 250 volts. In dangerous enviroments (e.g. wells and pumping stations) we recommend 24 V voltage. In potentially explosive atmospheres (e.g. oil tanks) the Switch can be used in conjunction with (Ex) i-isolator switch units. Due to its large float casing the float Switch has a buoyancy which guarantees smooth, trouble-free operation under all conditions. The switch has double chamber and a final remoulding finish to make it absolutely hermetic.   Installation : Cable Float Switch is simply placed in the liquid so that the float follows the movement of the surface. The switching height differential is adjusted by moving the weight along the cable. The differential is minimum, when weight is nearest to the float. If the viscosity of the liquid is high, we recommend an extra weight on the cable.

Rated Current : 10 Amp at 230 VAC Res