2. TECHNOCRACY PVT. LTD.
Weiber Plant Growth Chambers are designed to study the effect of described different environmental factors such
as humidity, temperature and light in various application tests on the growth of plants.
Plant growth and geographic distribution are greatly affected by the environment. If any environmental factor is less
than ideal, it limits a plant's growth and/or distribution. For example, only plants adapted to limited amounts of water
can live in deserts.
Either directly or indirectly, most plant problems are caused by environmental stress. In some cases, poor
environmental conditions (e.g., too little water) damage a plant directly. In other cases, environmental stress
weakens a plant and makes it more susceptible to disease or insect attack.
REACH-IN PLANT GROWTH CHAMBERS
R
3. Ÿ Temperature: is a measure of the intensity of heat. Plant growth occurs in a fairly narrow range - 60 - 100
degrees F. Temperature directly affects the processes of photosynthesis, respiration transpiration and
absorption of water and nutrients.
Ÿ Moisture supply: Plant growth is restricted by low and high levels of soil moisture as good soil moisture
improves nutrient uptake. If moisture is a limiting factor fertilizer is not used efficiently.
Ÿ Radiant energy: quality, intensity and duration (photoperiodism) of light are important for the plant growth.
Photoperiodism is defined as the behavior of plant in relation to length of the day. On the basis of day period the
plants can be:
1. Long day plants – Flowering occur only if days are longer than same critical period - 12 hours e.g. Grains and
clovers
2. Short day plants – flowering occur only if days are shorter than critical period e.g. soybeans.
3. Indeterminate – flowering occur over a wide range of day lengths. E.g. Tomato, cotton,buckwheat
Ÿ Composition of the atmosphere: plant growth majorly depends on the amounts of gases present in the
atmosphere such as carbon dioxide, nitrogen etc.
Ÿ Soil aeration and soil structure: Compact soils of high bulk density and poor structure are aerated poorly.
Pore space is occupied by air and water so the amount of air and water are inversely proportional to the amount
of oxygen in the soil. On well drained soils, oxygen content is not likely to be limiting to plant growth.
ENVIRONMENTAL FACTORS THAT AFFECT PLANT GROWTH INCLUDE
R
TECHNOCRACY PVT. LTD.
Chamber body: Double walled heated and convection unit, with the outer rust proofing wall made up powder
coated PCRC sheets and inner wall made up of stainless steel of grade 304.
Insulation: is a method of retardation for the flow of heat, this process reduce the heat loss or gain for energy
conservation thus saving the energy. Weiber thermal shock chamber provides insulation either through fibrous
insulation i.e. mineral glass wool or through cellular insulation i.e. polyurethane foam (PUF).
CONSTRUCTION
With a basic understanding of these factors, one (researcher/student) may be able to manipulate plants to meet
required needs, whether for increased leaf, flower, or fruit production. By recognizing the roles of these factors,
personnel also will be better able to diagnose plant problems caused by environmental stress.
4. Fibrous Insulation: Composed of air finely divided into interstices by small diameter fibers usually chemically or
mechanically bonded and formed into boards, blankets, and hollow cylinders.
Cellular Insulation: Composed of air or some other gas contained within a foam of stable small bubbles and
formed into boards, blankets, or hollow cylinders.
Heating: Desired positive temperature is provided through stainless steel sheathed air heaters, these heaters do
not affect the test specimen directly as they are placed in conditioning plenum proving indirect heat.
Air Circulation: Air circulation efficient motor fans are provided, ensuring uniform temperature throughout the
chamber.
Cooling: Negative temperature is maintained through ultra low temperature application compressor and non CFC
eco friendly R 404a refrigerant used.
Refrigeration: It is provided through hermetic and half-hermetic compressor cascade refrigeration system.
Hermetic compressor is completely sealed, especially against the escape or entry of air and semi-hermetic
compressor is partially sealed units and these units are mainly utilizes for real refrigeration work.
SALIENT FEATURES
Ÿ Reliable
Ÿ Aesthetically designed.
Ÿ Corrosion Resistant
Ÿ Energy Efficient
Ÿ CFC free cooling
Ÿ RS 232C interface
R
TECHNOCRACY PVT. LTD.
APPLICATIONS
Ÿ Production of biotherapeutic proteins
Ÿ Germplasm containments
5. Temperature Range
5 Degree to 50 degree Centigrade (without irradiation) and 10 Degree to 50
Degree Centigrade (with irradiation)
Temperature Sensor PT 100
Co2 range 300-5,000 ppm
Co2 Sensor
Non dispersive infrared (NDIR) gas sensors, it is a highly integrated analysis
system for monitoring respiratory carbon dioxide concentration.
Humidit 20% to 80% relative humidity
Temperature Control
The temperature is efficiently controlled by PLC based HMI interactive control
panel
TECHNOCRACY PVT. LTD.
Ÿ Biotechnology
Ÿ Agriculture
Ÿ Tissue Culture Applications
Ÿ Enzyme reaction applications
Ÿ Fermentation analysis
TECHNICAL SPECIFICATION
R
6. SALES OFFICE (HONG KONG)
SHOWROOM
SALES OFFICE (RUSSIA)
Unit D 28 11/F Wing Tat Comm,Bidg 97, Bonham Strand East,
Sheung Wan, Hong Kong (PRC)
Tel.: 0086-13929598046 0086- 18922303099
E-mail.: hk@acmasindia.com
J-284 Sector 1 Bawana Industrial Estate, Bawana,
Delhi, INDIA-110039
Tel.: 0091-0-9312219738 (M) +91- 9717741167
E-mail.: info@acmasindia.com
Inmed Trade Street Ozerkovsky Embankment,
Unit No 50, Straine- 1, Off- 502, Moscow, Russia
E-mail.: info@acmasindia.com
Tel.: 0049- 79592345 | Email: russia@acmasindia.com
TECHNOCRACY PVT. LTD.
www.acmasindia.com | www.cleanroom-equipments.com | www.test-chambers.com
An ISO 9001 : 2208 | ISO 14001 : 2008 | ISO 13485
WHO: GMP Products | GLP Compliant Products
SALES OFFICE (INDIA)
th
Office no. 506 & 507, 5 Floor, Plot no.- C-9,
Pearls Best Height-II, Netaji Subhash Place,
Pitam Pura, Delhi- 110034
Land Line No.: +91 - 11- 47619688,
Fax: +91-11-47619788
E-mail.: info@acmasindia.com
