A water bath is a lab constant temperature equipment, providing heat source for varieties of devices that need heating. The circulating water bath is used to keep water at a constant temperature for incubating samples in a laboratory.

Uses of Water bath:

A laboratory water bath is used to heat samples. Some applications include maintaining cell lines or heating flammable chemicals that might combust if exposed to open flame. A water bath generally consists of a heating unit, a stainless-steel chamber that holds the water and samples, and a control interface. Different types of water baths offer additional functionality such as a circulating water bath that keep a more even temperature or a shaking water bath that keeps the samples in motion while they are heated.

The inbuilt anticorrosion circulating pump can provide circulating constant temperature heat source for glass reactor and rotary evaporator. The liner of Lamphun GY series circulating water bath is made from imported stainless steel, shell is made from excellent cold rolled steel sheet spraying plastics, and electric heated tube plays function of enhancing heating speed in conduction oil. It is protected by heat insulation cotton, and Lamphun has improved the instruments, we use smart PID constant temperature heating device, double-screen LED temperature-controller is widely praised for its accuracy temperature control and controllable output flow.

What is to be considered when choosing a water bath?

Things to consider include the bath’s temperature range, capacity, whether there is a cooling option, how easy it is to clean, and whether it is a shaking or circulating water bath.

Types of water bath:

• A shaking water bath in action
• Circulating water baths

Circulating water baths:

Also called stirrers, are ideal for applications when temperature uniformity and consistency are critical, such as enzymatic and serologic experiments. Water is thoroughly circulated throughout the bath resulting in a more uniform temperature.

Non-circulating water baths:

This type of water bath relies primarily on convection instead of water being uniformly heated. Therefore, it is less accurate in terms of temperature control. In addition, there are add-ons that provide stirring to non-circulating water baths to create more uniform heat transfer.[4]

Shaking water baths:

This type of water bath has extra control for shaking, which moves liquids around. This shaking feature can be turned on or off. In microbiological practices, constant shaking allows liquid-grown cell cultures grown to constantly mix with the air.

Some key benefits of shaking water bath are user-friendly operation via keypad, convenient bath drains, adjustable shaking frequencies, bright LED-display, optional lift-up bath cover, power switch integrated in keypad and warning and cut-off protection for low/high temperature.

Constant temperature water baths generally contain an immersed electrical heating arrangement with a thermostat for its control. Also in use are the simple type constant temperature baths heated by an electrical lamp or heating coil, which can be slid into and out of a metal pocket inside the water bath submerged at its bottom. Students jar baths used in various experimental laboratories are operated on this principle. In the method described here electricity is Dot required. The heating source is located away from the bath and the temperature is regulated by adjusting the heat applied at a distance.

What’s the working principle of water bath?

Working principle of water bath: The sensor transfer water temperature to resistance value, amplified and compared by integrated amplifier, then output the control signal, efficiently control the average heating power of electric heating tube and maintain water in constant temperature. When you require balanced high temperature heating that, water bath is a good choice.

Operating the Water Bath:

1. Connect the power supply.
2. Ensure the water level in water bath is sufficient to pour the heating element.
3. Switch “ON” the main power supply and instrument mains.
4. For temperature settings, Press SET key to set the required temperature. press ↑ to increase the temperature and ↓ to reduce the temperature
5. The temp. Sensor will maintain the set temp. During use of water bath.
6. Switch “OFF” the instrument mains & main power supply after use.

Attention! Safety while using Water Bath:

DO NOT add too much water, so as not to overflow during water is boiling

After using the water bath, you should drain away water in time, clean the working chamber, so as to extend life span of instrument

Instructions for using Water Bath:

Glowing of Red lamp indicate mains “ON” & Glowing of yellow lamp indicate heater “ON”

1. Always ensure platform & surrounding are dry.
2. Use only Purified water to fill water bath.
3. Always. Switch “OFF” the mains on completion of water bath use.
4. Do not disturb the capillary (Temp. Sensor) located near the heater.

Maintenance of Water Bath:

Be it the older analogue or digital version, will require routine preventative maintenance from time to time. One of the things to always consider is filling the pan must always be done using water only. Distilled or deionized water will work best, as tap water often has minerals that can build up over time and make cleaning more difficult. It’s important to never use anything but water in the pan, as other materials when heated can create hazardous fumes and/or cause a fire danger when heated. When the pan is removed for cleaning, ensure the unit is unplugged. Wipe any debris off of the seal, and avoid spilling water into the unit to avoid damage to electrical components. Use only a damp cloth with mild detergents, avoiding any corrosive cleaning agents.

Always remember:

1. Unit must be turned off each day to avoid water evaporation and overheating of unit. Discard any old water in the pan.
2. When cleaning the unit with pan removed, care must be taken not to damage the thermostat. Damage could cause the unit to overheat.
3. To prevent electrical shock DO NOT REMOVE ground prong. Use only in properly grounded outlet.
4. Do not immerse unit in water. Unplug the unit before any maintenance or repair.
5. The removable stainless-steel pan and lift tray can be autoclaved with other instruments as needed.
6. Do not exceed 375F or 30 minutes.
7. Following these simple Water Bath maintenance and care tips can help ensure the longevity of your unit.

About Labkafe: Lab Equipment Manufacturer & Exporter

We are a School laboratory furniture and Lab equipment manufacturer and supplier. In laboratory furniture for school, we first design the entire laboratory room keeping in mind the requirements as per affiliation CBSE Bye-Laws. Also, we take care of the complete designing and installation of laboratory furniture.

In the lab equipment section, we have a wide range of glassware, chemicals, equipment and other lab accessories. Most of them are available for order online on our website but some of them can be procured on demand.

If you have need:-

• laboratory equipment or lab furniture requirements for school
• composite lab equipment list for school
• Physics lab equipment list for school
• Chemistry lab equipment list for
• Biology lab equipment list for school
• Pharmacy lab equipment

do drop a message through chat or mail us at sales@labkafe.com or WhatsApp +91-9147163562 and we’ll get in touch with you.

The post Water Bath Uses Working Principal Maintenance Safety Precautions Types & Uses appeared first on Labkafe Blog.

The magnetic stirrer consists of two main parts: motor with stirring mechanism and control electronics. Motor movement with a magnet on top causes rotation of stir bars which mix liquids. Control electronics supervises motor RPM, keyboard functions. Magnetic stirrers are designed for mixing fluids of different viscosity with the help of a stir that spins very quickly. They are commonly used for sample preparation and analysis, in chemistry Lab, biology lab, Pharmacy Lab and in such laboratory works as organic synthesis, extraction, oil analysis, pH measurement, dialysis, soil suspending, preparing buffer solutions where it is often needed to mix several types of liquids to get homogeneous mixtures. Magnetic stirrers have different service performance and technical parameters. The main difference is in the design which means that mixing occurs by rotating or oscillating processes. When you choose a magnetic stirrer, you should take into consideration the volume of the liquid container, the speed of rotation, the oscillation intensity, and heating if you need to raise the temperature of the mixture. A magnetic stirrer is an electromechanical device that mixes with the help of an external magnetic field that rotates a stir bar placed in the mixture. Stir bar rotates at different speeds and can mix volumes up to one litter. Since only a small magnet bar that can easily be cleaned and sterilized has to be put inside the sample, the risk of contamination is minimized. Magnetic stir bars work well in glass vessels. Glass is the material that doesn’t affect a magnetic field. The stir bar has a limited size that is why it can be used for relatively small experiments. They can have difficulties with viscous liquids and thick suspensions. The plastic case of the device serves as good isolation from spills. Magnetic stirrers have no moving parts and use a magnetic field. The housing of the most magnetic stirrers is made of polypropylene. The stir bar is made of ferrite enclosed in polypropylene. 

Magnetic Stirrer with hot plates is reliable, universal, and easy to use and meet all kind of safety standards. It is necessary to consider the oscillation intensity, time, and possible heating. Modern magnetic stirrers successfully deal with these tasks and provide the right conditions. Besides, this device is a must be an instrument for consistent, reproducible mixing or mixing over a long time, for example, for multi-hour or overnight sample mixing. Magnetic stirrers have an advantage over motorized ones. They are quieter and more efficient. They have no moving external parts to break or wear out. For cleaning stir bars, you don’t need lubricants which could be the reason for contamination of the product. Sometimes magnetic stirrers include a hot plate for heating the liquid. Built-in fault diagnostics and automatic thermal shutdown ensure the safety of magnetic stirrer usage. Magnetic stirrers are easy to use and they ensure high productivity and accuracy. 

Because of its small size, a stirring bar is more easily cleaned and sterilized than other stirring devices. They do not require lubricants which could contaminate the reaction vessel and the product. Magnetic stirrers may also include a hot plate or some other means for heating the liquid. 

The magnetic stirrer is used in many biological labs, including microbiology labs also. A magnetic stirrer is a laboratory device consisting of either a rotating magnet or stationary electromagnets creating a rotating magnetic field. This device is used to cause a stir bar immersed in a liquid to spin very quickly, agitating, or mixing the liquid. A magnetic stirrer often includes a provision for heating the liquid. Stirrers are often used in laboratories, especially in the field of biology and microbiology. They are preferred over gear-driven motorized stirrers because they are quieter, more efficient, and have no moving external parts to break or wear out (other than the simple bar magnet itself). Due to its small size, a stirring bar is more easily cleaned and sterilized than other stirring devices. Magnetic stirrers avoid two major problems with motorized stirrers. Firstly, motorized stirrers use lubricants, which can contaminate the reaction vessel and the product. Secondly, in motorized stirrers, the sealing of the connection between the rotating shaft of the stirrer and the vessel can be problematic, especially if a closed system is needed. Magnetic stirrers also have drawbacks. For example, the limited size of the stirring bar means it can only be used for relatively small experiments. In addition, viscous liquids or thick suspensions are extremely difficult to mix using this method, although there are some stirrers with special magnets to overcome this problem. 

Components of Magnetic Stirrer with Hot Plate:

1. Base with power switch, two control knobs, and LED indicators
2. Teflon-coated magnetic stir bar (1-inch length)
3. Power cord
4. Support stand (2-piece support rod, right-angle clamp, and thermometer holder)

How does a magnetic stirrer work (Working Principle)?

Magnetic stirrer working principle is repulsive for like charges and attractive for unlike charges. Micromotor drives magnet to generate rotating magnetic field to stir the stirring bar in a vessel, making solution conduct completely mixed reaction, stirring speed is adjustable, widely applies to solvent stirring in different viscosity. It equips with a temperature control system, which can heat and control the temperature of the sample according to experiment requirement, maintaining the needed temperature condition and guaranteeing the mixed liquid meets the experiment need. 

How to maintain a magnetic stirrer with Hot Plate?

1. Put the bottle on the working table.
2. Switch on the power switch, the indicator will light.
3. Choose to heat, turn on the heating power switch, the heating indicator will light, this means the heater is working now. Insert the sensor solution, adjust the thermostat knob to the desired temperature scale.
4. Adjust the speed control knob, rose to the required speed.
5. After work, set the speed control knob at the lowest speed position, the heating switch is in a non-working state, turn off the power switch, cut off the power supply.
6. Clean the working surface and sensor, make sure no water and dirt on it.

Precautions when using a magnetic stirrer with Hot Plate:

1. Instrument housing should be properly grounded to avoid accidents.
2. When unused for long periods, should cut off the power, store a dry and ventilated place.
3. The instrument should be kept clean and dry, prohibit the solution flows into the machine, to avoid damage to the machine, cut off the power when not working.
4. During mixing, when find stirrer is beating or non-stirring, reduce speed or disconnect the power to check whether the flat bottom of the beaker, location is positive.
5. Stirring heating time not too long, intermittent use can extend the life, not heated without stirring.
6. The medium-speed operation can continuously work for 8 hours, high-speed operation can continuously work for four hours, to prevent severe vibration during operation.

About Labkafe: Lab Equipment Manufacturer & Exporter

We are a School laboratory furniture and Lab equipment manufacturer and supplier. In laboratory furniture for school, we first design the entire laboratory room keeping in mind the requirements as per affiliation CBSE Bye-Laws. Also, we take care of the complete designing and installation of laboratory furniture. 

In the lab equipment section, we have a wide range of glassware, chemicals, equipment and other lab accessories. Most of them are available for order online on our website but some of them can be procured on demand. 

If you have need:- 

• laboratory equipment or lab furniture requirements for school
• composite lab equipment list for school
• Physics lab equipment list for school
• Chemistry lab equipment list for
• Biology lab equipment list for school
• Pharmacy lab equipment

do drop a message through chat or mail us at  sales@labkafe.com    or WhatsApp +919147163562 and we’ll get in touch with you.

The post Hot Plate with Magnetic Stirrer | Principle Uses Diagram with Price | Labkafe appeared first on Labkafe Blog.

1. Structure:
   • Base: The burner has a flat base that provides stability.
   • Gas Inlet: Attached to a gas source (usually natural gas or propane).
   • Barrel: A vertical metal tube where the gas mixes with air.
   • Air Vents: Located at the bottom of the barrel, these can be adjusted to control the amount of air that mixes with the gas.
   • Collar: A rotating ring at the base of the barrel that adjusts the size of the air vents.
2. Operation:
   • Gas Flow: When the gas valve is opened, gas flows through the inlet and into the barrel.
   • Air-Gas Mixture: As the gas enters the barrel, it mixes with air. The amount of air mixed can be adjusted by rotating the collar, which opens or closes the air vents.
   • Ignition: The gas-air mixture is ignited at the top of the barrel using a spark or flame.
   • Flame Control:
     • Yellow (Safety) Flame: With the air vents mostly closed, the flame is cooler and yellow, which is safer but less efficient for heating.
     • Blue (Heating) Flame: With the air vents open, more air mixes with the gas, producing a hotter, blue flame that is ideal for heating substances.

Uses of a Bunsen Burner in a Chemistry Lab

1. Heating Substances: The primary use of a Bunsen burner is to heat substances. It can be used to heat liquids in beakers, test tubes, or crucibles.
2. Sterilization: The flame can sterilize small tools, such as inoculation loops in microbiology labs, by burning off any contaminants.
3. Combustion Experiments: Bunsen burners are used in experiments involving combustion, such as testing the flammability of materials or demonstrating the principles of combustion reactions.
4. Melting and Boiling: The burner can be used to melt solids or boil liquids during experiments to observe phase changes.
5. Sublimation: Bunsen burners are used to heat substances that undergo sublimation, where a solid turns directly into a gas without becoming a liquid first.
6. Flame Tests: In analytical chemistry, Bunsen burners are used for flame tests to identify the presence of specific metal ions based on the color of the flame produced.

These applications make the Bunsen burner a versatile tool in various chemical processes and experiments.

To conclude, early science labs were organized with rooms filled by glass cases containing instruments and apparatus. They studied in order to better understand the Physics and Chemistry concepts at the root of the Bunsen burner and the experiments on flame tests. University scientific lab can reach secondary-school students with a “learning-by-doing” approach to explain the physics and chemistry concepts, connected to the study, conservation and valorisation of the Bunsen burners of the collections, utilizing the potentialities of museum activities, as keys to success, to give students more hands-on learning experiences.

Labkafe: Lab Equipment and lab Furniture Manufacturer

We are a School laboratory furniture and Lab equipment manufacturer and supplier. 

In laboratory furniture including Fume Hood, Lab Benches, Storage cabinets & Lab Pipeline connections, we first design the entire laboratory room keeping in mind the requirements and budget. Also, we take care of the complete designing and installation of laboratory furniture. 

In the lab equipment section, we have a wide range of glassware, chemicals, equipment, and other lab accessories. Most of them are available for order online on our website but some of them can be procured on demand.

If you have need:-

• laboratory equipment or lab furniture requirements for school
• composite lab equipment list for school
• Physics lab equipment list for school
• Chemistry lab equipment list for
• Biology lab equipment list for school
• Pharmacy lab equipment

do drop a message through chat or mail us at sales@labkafe.com or call +919147163562 and we’ll get in touch with you.

The post How does a bunsen burner works and its uses in a chemistry lab | Labkafe appeared first on Labkafe Blog.

A fume hood also called  “fume cupboard” or “fume closet” is a type of local ventilation that is made to control exposure to hazardous or toxic fumes, vapors, or dust.

There are two main types of Fume Hood, Ducted Fume hood, and Recirculating one which is the ductless Fume hood. 

The working principle of fume hood is the same for both the types of fume hood: Air is drawn in from the front which is the open side of the cabinet, either expelled outside the building or made safe through filtration and fed back into the room. So that users can be protected from hazardous fume & gases expelled during any experiment. Secondary functions of Fume Hood may include explosion protection, spill containment, and other necessary lab safety features. 

These are generally installed along the walls and are often fitted with infills above, to cover up the exhaust duct pipes. Because of their recessed shape, they are generally poorly lighted by the general room lighting, so many have internal lights with vapor-proof covers. The front is a sash window, usually in glass, able to move up and down on a counterbalance mechanism. On educational versions, the sides and sometimes the back of the unit is also glass, so that several pupils can look into a fume hood at once.

A general picture of Fume Hood may be as follows:

Now coming to the Fume Hoods, the two types are as follows:

1. Ducted Fume Hoods: Industrial processes use mostly these Fume Hoods. A large variety exists. In most designs, conditioned (i.e. heated or cooled) air is drawn from the lab space into the fume hood and then dispersed via ducts into the outside atmosphere.

The fume hood is only one part of the lab ventilation system. Because the recirculation of lab air to the rest of the facility is not permitted, air handling units serving the non-laboratory areas are kept segregated from the laboratory units.

2. Ductless Fume Hoods: These generally have a fan mounted on the top (soffit) of the hood, or beneath the worktop. Air is sucked through the front opening of the hood and through a filter, before passing through the fan and being fed back into the workplace. With a ductless fume hood, it is essential that the filter medium be able to remove the particular hazardous or noxious material being used.

A benefit of ductless fume hoods is that they are mobile, easy to install since they require no ductwork, and can be plugged into a 110 volt or 220-volt outlet.

In a survey (Ref 1.)of 247 lab professionals conducted in 2010, Lab Manager Magazine found that approximately 22% of fume hoods are ductless fume hoods. 

Do’s & Don’ts of using fume hood safely in a lab: 

Do’s of Using Fume Hood safely in a Lab

1. Do all work involving hazardous or volatile materials are inside a fume hood.
2. Check that the fume-hood is operating correctly before you start work. To check the airflow, use a strip of paper, tissue, or ribbon can be taped to the fume-hood sash.
3. Avoid cross drafts and disruptive air currents in front of the fume hood. Ensure that windows and doors near the fume-hoods are CLOSED.
4. Always keep work at least 15cm in from the opening of the fume hood.
5. Use the sash as a safety shield when boiling materials or conducting an experiment with reactive chemicals.
6. Always keep sash as low as possible. As the sash is lifted, flow is increased so that the face velocity of air over a given cross-section of the sash opening is constant. In summer especially, this will mean that hotter make up air is drawn into the lab.
7. When the fume hood is not in use, ensure that all materials are in sealed containers.
8. Connect all electrical devices outside of the hood to avoid sparks which may ignite a flammable or explosive chemical.
9. Prepare a plan of action in case of an emergency, such as a power failure, especially when using extremely hazardous chemicals or acids.

Don’ts of using fume hood safely in a  Lab

1. DO NOT place your face or head inside the hood. Keep hands out as much as possible.
2. DO NOT use a fume hood as a storage area, they should contain only working volumes of• DO NOT use fume hoods to vent or dispose of hazardous materials through air dilution.
3. DO NOT overcrowd or clutter the fume hood. Overcrowding creates vortices and dead spots. Vortices may cause hazardous material to flow back out of the fume hood causing exposure; dead spots may allow ignitable concentrations of flammable and combustible materials to accumulate; Large bulky equipment used in the hood will cause eddies.
4. DO NOT place equipment in the hood that stops the sash from closing. A safer local exhaust ventilation method may exist and should be pursued.
5. DO NOT modify fume hood or erect shelves in a fume hood for chemical or equipment storage.
6. DO NOT place power boards, or other spark-producing sources inside the hood.

How does a fume-hood work?

Fume-hoods draw air out of the rooms they are installed in. There needs to be an adequate volume of air available or the fume-hood will not be able to draw a sufficient volume of air to function properly. Where the room is small or there are a large number of fume-hoods an additional supply of air, other than the normal room ventilation, may be required. This additional air is known as the make-up air. If the make-up air supply is not adequate or the make-up air is switched off then the fume-hoods may not be able to achieve the required face velocity. This can cause fumes to escape into the laboratory. There are special fume hoods for perchloric acid and radioisotopes. Ensure that the appropriate hood is used for each specific reaction or process involving specific chemicals.

Hope this article helps while working with the Fume Hood. Happy Experimenting!

You may also check out our blog on COMMON SCHOOL SCIENCE LABORATORY EQUIPMENT AND THEIR USES

Reference: 

1. https://www.labmanager.com/?articles.view/articleNo/3857/article/Shopping-for-a-Fume-Hood–See-the-Survey-Results

Labkafe: Lab Equipment and lab Furniture Manufacturer

We are a School laboratory furniture and Lab equipment manufacturer and supplier. 

In laboratory furniture including Fume Hood, Lab Benches, Storage cabinets & Lab Pipeline connections, we first design the entire laboratory room keeping in mind the requirements and budget. Also, we take care of the complete designing and installation of laboratory furniture. 

In the lab equipment section, we have a wide range of glassware, chemicals, equipment, and other lab accessories. Most of them are available for order online on our website but some of them can be procured on demand.

If you have need:-

• laboratory equipment or lab furniture requirements for school
• composite lab equipment list for school
• Physics lab equipment list for school
• Chemistry lab equipment list for
• Biology lab equipment list for school
• Pharmacy lab equipment

do drop a message through chat or mail us at sales@labkafe.com or call +919147163562 and we’ll get in touch with you.

The post Fume Hood and its use in a Chemistry Lab | Labkafe appeared first on Labkafe Blog.