Lab thermostat

A laboratory, thermostat technology, used in laboratory utensils, instruments, liquid level indicators, etc., to solve problems such as destruction of bacterial cultures and causing problems

Inactive Publication Date: 2007-10-31
JULABO LABORTECHNIK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, due to open circuits, it can cause problems when processing
For example, during the internal thermostating of a bacterial culture in a bath, there is the risk that the bacterial culture will be irreparably destroyed due to a sudden interruption of the thermostating process
Furthermore, during external treatment, an interruption of the thermostatic treatment also entails that the entire treatment process in question has to be restarted at corresponding expense

Method used

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Embodiment Construction

[0020] The laboratory thermostat shown in the figure includes a regulating / safety electronic device 5 with a control device for insufficient liquid level in the bath and one for at least one optical and / or acoustic Analysis device of alarm device.

[0021] In addition, it may also include a temperature sensor 6, a heater 7, an immersion pump 8 with an external pump connector 9, and a floating body 10 with an electric switching element 11, by means of which a circuit breaker function can be realized, especially A safe circuit break function.

[0022] The new early warning system has another switching element 12. The regulating / safety electronic device 5 includes a buzzer 13 for triggering by a pulsed acoustic signal, and is electrically connected to the switching element 12 and the switching element 11, and the switching element 11 triggers a disconnection by a permanent signal tone Features.

[0023] The early warning system is combined with a ring-shaped membrane keyboard 14, a v...

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PUM

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Abstract

A laboratory thermostat features a heating and / or cooling device for temperature control of a liquid bath medium located in a bath tank. The laboratory thermostat has an early-warning system with a control device for a low liquid level in the bath tank and an evaluation device that can realize at least an acoustic and / or visual warning message for maintaining the temperature control process. Due to the integrated early-warning system, when the liquid level decreases, the user of the laboratory thermostat is made aware in due time before undesired shutdown by a low-liquid-level protection device, so that lost temperature control fluid can be immediately refilled before the safety shutdown is triggered by the low-liquid-level protection device.

Description

Technical field [0001] The invention relates to a laboratory thermostat with a heating and / or cooling device, which is used for thermostatic treatment of a liquid bath medium in a bath. Background technique [0002] Laboratory thermostats are used for high-precision thermostating and keep an adjustable temperature constant. The main functional elements are heaters, circulating pumps and electronic regulating devices. A bath is used to hold a constant temperature liquid. Higher temperature water, bath oil or sub-zero temperature alcohol liquid is used as a constant temperature medium. [0003] With the help of an integrated circulation pump, the laboratory thermostat is used for both the internal thermostatic task in the bath and the external thermostatic treatment of a consumer. In addition, thermostatic treatment of external measurement and analysis system equipment, reaction systems or measurement units in a thermostatic cycle is dominant in scientific research and most industr...

Claims

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Application Information

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IPC IPC(8): B01L7/02G01F23/60
CPCB01L2200/14G01F23/60B01L7/02G01F23/363G01F23/603
Inventor 格哈德·尤赫海姆
Owner JULABO LABORTECHNIK
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