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CONTACT AND PENETRATION TEMPERATURE PROBES.
Temperature probes for use with k-type connection thermometers.
ORDER CODES
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CONTACT AND PENETRATION TEMPERATURE PROBES.
Temperature probes for use with k-type connection thermometers.
ORDER CODES
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COMPONENTS
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USE OF KIT Silt Density Index (SDI) is an empirical test developed for measuring the rate of fouling of nano filtration (NF) or RO membranes. Suspended solids and colloidal materials in feed water are one of the biggest problems in reverse osmosis systems. Although most systems have some pre-treatment, including 5-micron pre-filters, these fine particles are responsible for the fouling of reverse osmosis membranes. In order to measure the degree of this fouling problem, a concept called Silt Density Index is used. Here filtration rates are calculated by exposing a 0.45-micron filter to the feed water under pressure. An SDI of less than 5 is typically considered acceptable for the reverse osmosis systems. This means membranes should foul at a very low rate at SDI values of less than 5. Although this concept works most of the time, there are exceptions when a lower SDI (less than 3) is desirable due to the nature of the suspended solids in the feed water. OPERATION SDI represents the potential for fouling of the membranes by finely suspended particles present in feed water to the membranes. There is no direct correlation between turbidity of a water stream and its SDI. Experience has shown that water with a very low turbidity (< 1 NTU) may have a high SDI value. Deep tubewell waters, as a rule, are free from suspended solids and exhibit a low turbidity value/SDI. On the other hand, surface water invariably contains high levels of fine suspended solids and therefore exhibits high turbidity as well as high SDI, calling for extensive pretreatment to achieve acceptable values of SDI and turbidity in feed water. GENERAL INFORMATION Depleting supplies of fresh water, ground water contamination and the rising cost of water have compelled industries to increasingly turn to the desalination of brackish/sea water as well as water recovered from treated industrial effluent and secondary treated municipal sewage. All these recycled water systems use reverse osmosis (RO) system for removal of dissolved solids. The presence of finely divided particles in feed water to an RO system can cause serious problems as they are too small to be retained by conventional pretreatment systems they find their way to the RO membrane. The function of an RO membrane is to concentrate dissolved solids on one side of the membrane and allow water molecules to permeate through the other side. Suspended, colloidal particles are larger than dissolved solids and are also rejected by the membrane. These fine undissolved suspended particles tend to settle on the surface and, in the process, foul the membrane. The net result is an increase in feed pressure, reduced flow and high conductivity of permeate. Spiral wound and hollow fine fibre membranes are the most vulnerable and once fouled, cleaning of the element is often difficult. Filter paper colouration after the SDI test: i) Slightly yellow The possible problem could be presence of iron and/or organics in feed water. Check the source. ii) Reddish brown Positive indication of presence of iron in feed water. Take corrective steps for removal of iron. iii) Gray Indicates presence of carbon fines. Check the carbon filter, remove carbon fines. iv) Particles present on Check the cartridge filter and the filter elements. the filter paper v) Dark Black If the colour dissolves in the acid, it indicates the presence of manganese in the water.
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KEY FEATURES
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EASY TO USE REFRACTOMETER The RHA-200ATC refractometer is ideal for measuring both Ethylene Glycol & Propylene Glycol. The refractometer is equipped with the °C unit system and is capable of measuring with high accuracy, and providing precise results.The RHA-200ATC comes equipped with a clear reticle for easy reading and there is no need for batteries as it works on ambient light. Easy to use, just take a small sample of solution and drop in on to the prism to get a reading in seconds. It can also be used to measure the concentration of the Antifreeze liquids. The RHA-100ATC’s built in automatic temperature compensation system means the refractometer is highly reliable and provides excellent results. |
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PRODUCT SPECIFICATION
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COMPONENTS
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SILT DENSITY INDEX KIT (SDI001) Silt Density Index (SDI) is an empirical test developed for measuring the rate of fouling of nano filtration (NF) or RO membranes. Suspended solids and colloidal materials in feed water are one of the biggest problems in reverse osmosis systems. Although most systems have some pre-treatment, including 5-micron pre-filters, these fine particles are responsible for the fouling of reverse osmosis membranes. In order to measure the degree of this fouling problem, a concept called Silt Density Index is used. Here filtration rates are calculated by exposing a 0.45-micron filter to the feed water under pressure. An SDI of less than 5 is typically considered acceptable for the reverse osmosis systems. This means membranes should foul at a very low rate at SDI values of less than 5. Although this concept works most of the time, there are exceptions when a lower SDI (less than 3) is desirable due to the nature of the suspended solids in the feed water. OPERATION SDI represents the potential for fouling of the membranes by finely suspended particles present in feed water to the membranes. There is no direct correlation between turbidity of a water stream and its SDI. Experience has shown that water with a very low turbidity (< 1 NTU) may have a high SDI value. Deep tubewell waters, as a rule, are free from suspended solids and exhibit a low turbidity value/SDI. On the other hand, surface water invariably contains high levels of fine suspended solids and therefore exhibits high turbidity as well as high SDI, calling for extensive pretreatment to achieve acceptable values of SDI and turbidity in feed water. GENERAL INFORMATION Depleting supplies of fresh water, ground water contamination and the rising cost of water have compelled industries to increasingly turn to the desalination of brackish/sea water as well as water recovered from treated industrial effluent and secondary treated municipal sewage. All these recycled water systems use reverse osmosis (RO) system for removal of dissolved solids. The presence of finely divided particles in feed water to an RO system can cause serious problems as they are too small to be retained by conventional pretreatment systems they find their way to the RO membrane. The function of an RO membrane is to concentrate dissolved solids on one side of the membrane and allow water molecules to permeate through the other side. Suspended, colloidal particles are larger than dissolved solids and are also rejected by the membrane. These fine undissolved suspended particles tend to settle on the surface and, in the process, foul the membrane. The net result is an increase in feed pressure, reduced flow and high conductivity of permeate. Spiral wound and hollow fine fibre membranes are the most vulnerable and once fouled, cleaning of the element is often difficult. Filter paper colouration after the SDI test: i) Slightly yellow The possible problem could be presence of iron and/or organics in feed water. Check the source. ii) Reddish brown Positive indication of presence of iron in feed water. Take corrective steps for removal of iron. iii) Gray Indicates presence of carbon fines. Check the carbon filter, remove carbon fines. iv) Particles present on Check the cartridge filter and the filter elements. the filter paper v) Dark Black If the colour dissolves in the acid, it indicates the presence of manganese in the water. |
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KEY FEATURES
Note: Range is dependant on measuring instrument used. |
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COMPREHENSIVE KIT The DTK comprehensive Cooling (Open & Closed) Test Kit for Cooling Towers & Heating/Chilled water systems has been developed specifically for engineers and treatment professionals responsible for the maintaining and management of water systems. This test kit has been designed to include the key parameters which enable the optimum operating conditions in these water systems. The kit provides accuracy and speed, utilising drop test and comparator reagents together with electronic meters for the most efficient monitoring of water samples. The reagents and equipment are specified below. The CWTK002 is supplied in a robust carry case with reagents and instruments secured by a high quality chemical resistant foam insert with sufficient chemical reagents to carry out between 100 and 200 tests. INDUSTRIAL WATER TREATMENT Cooling water systems and Closed water systems require careful monitoring to ensure that the correct water conditions are maintained within an approved treatment programme. Our comprehensive cooling and closed system test kit has been designed specifically for water treatment professionals involved in the maintenance and management of cooling and closed systems to ensure optimium operating conditions are maintained. Any failure to maintain the correct levels and dosing of the chemical treatments can lead to:
These can lead to unstable water conditions with potential negative consequences to the life of the plant and operating costs. |
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*For true soluble and total iron determination, Sulphuric Acid 50% and 0.45 µm Filter Papers are required and can be ordered separately. |
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KEY FEATURES
Note: Range is dependant on measuring instrument used. |
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CHLORINE DISINFECTION – ORDER CODE CRK004 Chlorination is the process of adding chlorine to water as a method of sanitizing and purifying it to prevent the spread of infection and disease. Chlorinated water systems require careful monitoring to ensure the correct conditions are achieved and maintained whilst operational and during the disinfections process. Failure to achieve the correct chlorination levels in disinfections or sanitizing can lead to unsuccessful disinfections and conversely elevated levels can lead to potentially corrosive conditions. COMPREHENSIVE KIT The DTK Chlorination test kit has been developed specifically for engineers and treatment professionals responsible for the chlorination and disinfections of water systems. The kit is available in two options; tablets or solutions. This Chlorination kit has been designed to measure low and high levels of chlorine from 0.1 mg/l to 4 and 10 to 300 mg/l using two different test chemistry’s. Applications for this kit include;
The kit provides convenience, accuracy and speed, utilising tablet and liquid reagents with a comparator. The reagents and equipment are specified below. The CRK004 is supplied in a robust carry case with reagents and instruments secured by a high quality chemical resistant foam insert with sufficient chemical reagents to carry out 50 tests. |
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TEST KIT & INSTRUMENTS
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DBNPA / GLUTARALDEHYDE/ ISOTHIAZOLONE / THPS /
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KEY FEATURES
Note: Picture shown displays only the DBNPA test kit with Powder Pillows. |
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BIOCIDE TEST KITS Measuring non oxidising biocides is crucial in ensuring that the biocide in use is not over or under dosed and these kits are ideal for this application. Each of our non-oxidising biocide test kits is supplied ready to use. Each kit contains all the necessary reagents to carry out between 50 and 100 tests and uses either a colour card, comparator or drop count to determine the reserve. These test kits can be used to determine the level of biocides in Open & Closed water systems and can be used when dosing biocides to systems recently pre-commissioned cleaned. |
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Parameter
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Range
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Code
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DBNPA Test Kit
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0 to 6.8 mg/l
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NTK005
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DBNPA Comparator Disc
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255020
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DPD No 1 Tablets (50 pk)
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SDT106
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DPD No 3 Tablets (50 pk)
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SDT107
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Glutaraldehyde Test Kit
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12.5 to 1600 mg/l
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NTK006
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PA1 Phenolphtalein Indicator (65 ml)
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SDT001
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GL1 Powder (5 g)
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SDT605
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GL2 Titrant (65 ml)
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SDT606
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Sodium Hydroxide 0.1 M / 0.1 N (65 ml)
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SDT453
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Sulphuric Acid 0.5 M / 0.5 N (65 ml)
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SDT384
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Isothiazolone Test Kit
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0 to 7.5 mg/l
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NTK001
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dK1 (30 ml)
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SDT254
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dK2 (65 ml)
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SDT255
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dK3 (65 ml)
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SDT256
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dK4 (65 ml)
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SDT257
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dK5 (30 ml)
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SDT258
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THPS Test Kit
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0 to 20 mg/l
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NTK007
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0.1 N Iodine Solution (100 ml)
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SDT162
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DSP Solution (65 ml)
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SDT204
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PSSA Solution (65 ml)
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SDT021
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THPS Starch Indicator (10 g)
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SDT207
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