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Block Heater

Block heater used in laboratory

What is block heater?

Block heater, also known as a dry thermostat, replaces the traditional water bath heating method and can be widely used for sample preservation, preservation, and the reaction of various enzymes, denaturation of nucleic acids and proteins, PCR reactions, pre-denaturation of electrophoresis and serum coagulation.

The emergence of the block heater avoids the problem of traditional water bath heating pollution, while the temperature control is more accurate and can control the temperature range is also larger. It does not have the disadvantages of traditional dry thermostats, such as large temperature fluctuations, easy pollution, temperature control trouble, etc. It is a good alternative to the traditional water bath device.

Most of the traditional laboratory heating reaction equipment usually uses an oil bath or electric heating set, the safety is very poor, so the possible cause of laboratory fires occurs from time to time. Now the temperature-controlled aluminum alloy heating module is used, and the stability and uniformity of temperature are better than the traditional oil bath and electric heating set, which can be heated and stirred, so safety is guaranteed, and the maintenance and repair are convenient.

Block heaters consist of modules and the main unit and are generally classified into models based on the modules' type, number, and temperature control range. The general thermostat is divided into heating and heating and cooling type.

Features of block heater

a. Good uniformity of the material. It can ensure its good thermal stability, uniform heating temperature, and high efficiency of heat conduction.

b. It can reach the desired temperature in a short time and the temperature is stable.

c. Tested by up to 240 hours of continuous operation. When the set temperature is reached, it can maintain the set temperature and the temperature fluctuation does not exceed ±1℃.

d. Made of alloy material with special anti-oxidation treatment, which has strong corrosion resistance.

e. The heating module completely avoids the shortcomings of traditional oil bath heating and is safer, more reliable, and cleaner to use. The heating temperature can reach the high temperature that can be heated by the thermal stirrer. Since there is no burning medium, it will not cause fire, thus providing a safe experimental environment.

f. It is recommended to carry out gradient heating during use to avoid the appearance of overshoot caused by too rapid heating. When the temperature of the heating block reaches the set temperature and is stable, then place the reaction vial on the heating block.

g. Not limited by the shape of the heating stirrer disc, square or round discs of the heat stirrer can be used.

h. Temperature can be monitored using a pt1000 or pt100 temperature sensor, or directly using a thermometer.

Product parameters of block heater

Temperature control accuracy≤±0.4℃
Module temperature uniformity≤±0.4℃
Temperature control range5℃ to 100℃ above room temperature
Temperature rise time from 20 ℃ to 100 ℃≤ 24 minutes
High power150W
High temperature105℃
Time settingUp to 99h59min
Net weight2.8Kg
Instrument size225 * 162 * 197 mm

Prerequisites for block heater temperature calibration

a. Environmental requirements. Temperature calibration is required at an ambient temperature of 15C~25C.

b. Humidity requirements. Humidity conditions should be carried out under less than 85%.

c. One of the important apparatuses for temperature calibration is the national second-class standard thermometer (0.1C scale), which must be calibrated by the department of the national second-class standard thermometer. (For modules with larger holes), ordinary thermometers or high-precision thermometers that have not been calibrated and measured are not allowed.

d. High-precision thermistors and other sensors are also important instruments for temperature calibration, and they must be department-calibrated high-precision thermistors and other sensors. (For the module hole is a relatively small module).

Magnet heater

Magnetic heater is one of the most widely used heating methods in today's industrial field and civil equipment. It uses electromagnetic heating technology. Electromagnetic induction heating technology, referred to as IH (Induction Heating) technology, was developed based on Faraday's Law of Induction, which is a form of application of Faraday's Law of Induction. Its essence is to use electromagnetic induction to generate eddy currents in the column to heat the workpiece of electric heating, it is the conversion of electrical energy into electromagnetic energy, and then from electromagnetic energy into electrical energy, electrical energy is transformed into heat energy inside the metal to achieve the purpose of heating the metal, thus eliminating the harm and interference of open flame in the heating process, is an environmentally friendly heating solution.

The magnetic heater is a device that converts electrical energy into heat energy by using the principle of electromagnetic induction. The electromagnetic controller converts 220V/380V, 50/60Hz alternating current into direct current through a rectification circuit. Then the control circuit will be converted into DC voltage of different frequencies. The current flowing through the coil will produce a changing alternating magnetic field. When the alternating magnetic field through the magnetic conductivity of metal (iron, cobalt, nickel) materials will produce countless small vortexes in the metal body, which makes the metal material high-speed heating, to achieve the purpose of heating metal materials.

Working principle of magnetic heater

Magnetic heating is an energy conversion process that uses the principle of electromagnetic induction to convert electrical energy into heat energy. The rectifier circuit converts the 50/60Hz AC voltage into DC voltage, and then the power control circuit converts the DC voltage into a high-frequency voltage with a frequency of 20-40kHz. The alternating magnetic force lines in the magnetic field pass through the metal pipe (magnetic conductivity, conductive material), and countless small eddy currents are generated inside the pipe wall so that the pipe wall of the oil pipeline itself heats up and heat exchanges with the crude oil to achieve the purpose of heating the crude oil.

The frequency converter is the core component of a high-frequency electromagnetic heater, which is an electrical energy control device that transforms the working frequency power supply into another frequency by using the on-off action of power semiconductor devices. The inverter currently in use uses the AC-DC-AC method. First, the industrial frequency AC power is converted to DC power by rectifier, and then the DC power is converted to AC power with controllable frequency and voltage and supplied to the motor. The circuit of the inverter is generally composed of four parts, they are rectifier, intermediate DC link, inverter, and control. The rectifier is a three-phase bridge type uncontrolled rectifier, the inverter is an IGBT three-phase bridge type inverter with PWM waveform output, and the intermediate DC link is for filtering, DC energy storage, and buffering reactive power.

Features of block heater

A. Ordinary heating ring heating method

Contact heat transfer heating
a. 30-70% of electricity consumption is converted into working heat.

b. Heat must be transferred through contact.

c. Heating and cooling have inertia phenomena, and heating and cooling are slow.

d. Heating has a dead corner, so it cannot be completely wrapped in the outer layer of the barrel.

e. High loss of heating coil and short life.

B. Electromagnetic induction heating

Non-contact electromagnetic induction heating
a. 95% of the power consumption is converted into working heat.

b. Only heats the barrel, while the screw stays cool.

c. Eliminate the inertia phenomenon of heating, heating up, and cooling down quickly and efficiently.

d. No dead spots in heating. The whole barrel is heated evenly.

e. The solenoid coil stays cool and therefore has a super long life.

Application of magnet heater

a. Plastic and rubber industry, such as plastic with film blowing machine, wire drawing machine, injection molding machine, granulating machine, rubber with extruder, vulcanizing machine, cable production extruder, etc.

b. Pharmaceutical and chemical industry, such as pharmaceutical special infusion bags, plastic equipment production line, chemical industry liquid heating conveying pipeline, etc.

c. Energy, food industry, such as heating of crude oil transmission pipeline.

d. Food machinery, such as supercargo machines and other equipment that needs electric heating.

e. High power commercial induction cooker movement.

f. Building materials industry, such as gas pipe production line, plastic pipe production line, PE plastic rigid flat net, geotechnical net unit, automatic hollow forming machine, PE honeycomb board production line, single and double wall corrugated pipe extrusion line, composite air cushion film unit, PVC rigid pipe, core layer foam pipe production line, PP extrusion transparent sheet production line, extruded polystyrene foam pipe, PE winding film unit.

g. Drying heating in printing equipment.

h. Other similar industries.

How to buy block heater?

ANTITECK provide lab equipment, lab consumable, manufacturing equipment in life sciences sector.
If you are interested in our block heater or have any questions, please write an e-mail to, we will reply to you as soon as possible.

    AntiTeck Life Sciences Limited

    A1-519, XingGang GuoJi, Yingbin Road, Huadu, Guangzhou, China, 510810
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