CH Instruments in Bangladesh

Vvon Technologies Limited supplies, installs and services CH Instruments equipment across Bangladesh. 61 products are catalogued across Nanotechnology.

Categories

• Accessories & Modules (51)
• Electrical & Electrochemical Characterisation (10)

Products

• Model 400C Series Time-resolved Electrochemical Quartz Crystal Microbalance (EQCM): The 400C series pairs a quartz crystal microbalance with a potentiostat so mass change at the electrode is recorded alongside potential, current and charge. It is used for metal deposition, ion transport in polymer films and biosensor studies. Models 400C to 440C are offered, the 440C adding a galvanostat.
• Model 600F Series Potentiostat/Galvanostat: The 600F series is a general purpose electrochemical workstation containing a fast function generator, dual channel data acquisition, a potentiostat and, on selected models, a galvanostat. It covers voltammetry, pulse techniques, corrosion and impedance work. Models run from the basic 600F to the 660F workstation.
• Model 700F Series Bipotentiostat: The 700F series is a general purpose bipotentiostat and galvanostat for experiments needing two controlled working electrodes, such as rotating ring disk electrode work and dual channel detection. Used as a single channel instrument it matches the 600F series. Models range from the 700F to the 760F.
• Model 800D Series Electrochemical Detector: The 800D series is built for electrochemical detection, monitoring current through a flow cell in liquid chromatography or flow injection analysis. Its low noise circuitry measures down to picoamperes and plots three decades of current scale during a run. The 8x2D models add a bipotentiostat for dual channel work.
• Model 920D Series Scanning Electrochemical Microscope (SECM): The 920D scanning electrochemical microscope combines a bipotentiostat with a three dimensional nanopositioner, cell and sample holder to map chemical reactivity near surfaces. Modes include SECM imaging, probe scan and approach curves, surface interrogation SECM and surface patterned conditioning.
• Model 1000D Series Multi-potentiostat: The 1000D series is an eight channel potentiostat that can drive eight independent cells or eight working electrodes sharing one reference and counter electrode. Each channel has its own on or off state, potential and sensitivity setting, and channels can sweep or step together with the primary channel.
• Model 1100D Series Power Potentiostat/Galvanostat: The 1100D series is a power potentiostat and galvanostat for work needing large current and high compliance voltage, such as battery testing, corrosion, electrolysis and electroplating. It uses a four electrode configuration and still resolves current down to tens of picoamperes. The 1140D adds a galvanostat.
• Model 1200C Series Handheld Potentiostat/Bipotentiostat: The 1200C series is a hand held potentiostat and bipotentiostat for electroanalysis and sensor studies. It draws power from the USB port of the host computer, so no adapter or battery is needed, which suits field work and teaching laboratories. Potentiostat and bipotentiostat versions are offered.
• Model 1400 Series 4-Channel Potentiometer/Potentiostat: The Model 1400 combines a four channel potentiometer with a four channel potentiostat, so open circuit sensors such as ion selective electrodes can be read at the same time as amperometric or voltammetric sensors. It is aimed at electrode array characterisation and real time cell metabolism sensing.
• CHI1550A Series Pico Liter Solution Dispenser: The CHI1550A dispenses picolitre droplets to build high density solution arrays for chemical, biological and medical work. It combines a three dimensional positioner, a piezoelectric jetting device and a sample platform, with software for binary, ternary and quaternary array patterns.
• CHI200(B) Picoamp Booster and Faraday Cage: The CHI200(B) is a picoamp booster and Faraday cage that lets current down to a few picoamperes be measured. It places the preamplifier close to the electrode for lower bias current and noise, and the cage also suppresses mains frequency interference. Detection and switching are automatic.
• CHI680D Amp Booster: The CHI680D amp booster extends current measurement to 2 A and stacks with the host instrument. It also allows low current measurement, though a Faraday cage may be needed above 50 mV per second. Cell control signals for purge, knock and stir are disabled while the booster is connected.
• CHI684 Multiplexer: The CHI684 is a multi channel multiplexer that switches the working, sensing, reference and counter lines between cells so a sequence of experiments can be run unattended. Channels are chosen from the Control menu or by macro command, and data is saved to file after each run.
• CHI101 2 mm diameter Gold Working Electrode: CHI101 is a gold working electrode with a 2 mm diameter disc. CH Instruments group it with the CHI102, CHI103 and CHI104 working electrodes, all four sharing a single figure on the accessory list. Electrodes are supplied already polished and ready to use, and the CHI120 polishing kit is offered for renewing the surface before experiments.
• CHI102 2 mm diameter Platinum Working Electrode: Platinum is the disc material in this 2 mm diameter working electrode. It sits in the CHI101 to CHI104 working electrode group on the CH Instruments accessory list and is illustrated in the figure published for that group. As with the other solid electrodes in the range, it arrives polished and can be resurfaced with the CHI120 polishing kit.
• CHI103 2 mm diameter Silver Working Electrode: This working electrode carries a silver disc of 2 mm diameter and is catalogued as CHI103. CH Instruments list it in the same family as the CHI101, CHI102 and CHI104 working electrodes, which share one published figure. The CHI120 polishing kit is the listed accessory for renewing its surface.
• CHI104 3 mm diameter Glassy Carbon Working Electrode: Glassy carbon forms the 3 mm diameter disc of the CHI104 working electrode, the largest of the four electrodes in the CHI101 to CHI104 group. All four are shown together in one figure on the CH Instruments accessory list. CH Instruments supply the electrode polished, and the CHI120 kit takes the surface back to a mirror finish with 1.0, 0.3 and 0.05 micron powders.
• CHI105 12.5 micron diameter Gold Microelectrode: A gold microelectrode of 12.5 micron diameter, the finest gold microelectrode CH Instruments list. It belongs to the CHI105 to CHI108 group of gold and platinum microelectrodes that share a single published photograph. CH Instruments also list the CHI201 picoamp booster, which reads current down to 1 pA, in the same accessory range.
• CHI106 25 micron diameter Gold Microelectrode: CHI106 is the 25 micron diameter gold member of the CH Instruments microelectrode set. The accessory list photographs it together with the CHI105, CHI107 and CHI108 as the Au/Pt microelectrode group. It is the larger of the two gold sizes offered.
• CHI107 10 micron diameter Platinum Microelectrode: With a 10 micron diameter platinum disc, CHI107 is the smallest microelectrode on the CH Instruments accessory list. It is published as part of the CHI105 to CHI108 Au/Pt microelectrode group and shares that group's photograph. Gold equivalents of 12.5 micron and 25 micron are listed as CHI105 and CHI106.
• CHI108 25 micron diameter Platinum Microelectrode: This platinum microelectrode is published with a 25 micron diameter and is the larger of the two platinum microelectrode sizes CH Instruments offer. It is listed alongside CHI105, CHI106 and CHI107 in the Au/Pt microelectrode group and appears in the shared group photograph.
• CHI111 Ag/AgCl Reference Electrode with porous Teflon Tip: CHI111 is the silver / silver chloride reference electrode in the CH Instruments range, closed with a porous Teflon tip. The accessory list pairs it in one figure with the CHI112 non-aqueous reference electrode. It provides the reference half of a three electrode arrangement built from the working and counter electrodes on the same list.
• CHI112 Non-Aqueous Ag/Ag+ Reference Electrode with porous Teflon Tip: For non-aqueous work CH Instruments list the CHI112, a silver / silver ion reference electrode fitted with a porous Teflon tip. The published note states that the Ag+ solution, typically 10 mM, has to be made up from the supporting electrolyte and AgNO3, neither of which is supplied, and then loaded into the reference compartment with a syringe that is also not supplied. Instructions are shipped with the components. It shares a figure with the CHI111 aqueous reference electrode.
• CHI115 Platinum Wire Counter Electrode: CHI115 is a platinum wire counter electrode, published with its own figure on the CH Instruments accessory list. It supplies the counter electrode in cells assembled from the working and reference electrodes in the same range.
• CHI116 10 micron diameter Platinum SECM Tip: This is the 10 micron diameter platinum tip CH Instruments supply for scanning electrochemical microscopy, captioned CHI116 Pt SECM Tip in the accessory photographs. It is the probe consumable for the 920D Scanning Electrochemical Microscope (SECM) in the CH Instruments instrument range.
• CHI117 25 micron diameter Platinum SECM Tip: CHI117 is the 25 micron diameter platinum SECM tip, the coarser of the two sizes CH Instruments list. Like the CHI116 it serves as the scanning probe for the 920D Scanning Electrochemical Microscope (SECM).
• CHI120 Electrode Polishing Kit: The CHI120 is the consumable kit CH Instruments supply for renewing the surface of their solid working electrodes. Its published instruction sheet lists 4 grams of 1.0 micron MicroPolish powder, 4 grams of 0.3 micron powder, 18 grams of 0.05 micron powder, two glass plates for the polishing pads, and three grades of 73 mm diameter disc and pad. The stated routine works down through 1.0, 0.3 and 0.05 micron alumina until the electrode surface is mirror shiny, starting at the 1200 grit Carbimet disc if scratches will not lift.
• CHI125A Polished, Bounded, Mounded 100A Ti + 1000 A Gold Crystal for EQCM: CHI125A is the coated quartz crystal CH Instruments list for electrochemical quartz crystal microbalance work, published as polished, bounded and mounded with a 100 A titanium layer beneath 1000 A of gold. It is the consumable crystal for the CHI127 EQCM cell and the 400C Time-Resolved Electrochemical Quartz Crystal Microbalance (EQCM) instrument series.
• CHI127 EQCM Cell: The CHI127 is the electrochemical cell CH Instruments publish for quartz crystal microbalance measurements, shown in its own photograph on the accessory list. CH Instruments list a matching reference electrode as CHI128 and a platinum wire counter electrode as CHI129 for it, with the CHI125A gold coated crystal as the working surface. It supports the 400C Time-Resolved Electrochemical Quartz Crystal Microbalance (EQCM) series.
• CHI128 Reference Electrode for EQCM Cell: CHI128 is the reference electrode CH Instruments list specifically for the CHI127 EQCM cell. It completes that cell together with the CHI129 platinum wire counter electrode and a coated quartz crystal such as the CHI125A.
• CHI129 Pt Wire Counter Electrode for EQCM Cell: This platinum wire counter electrode is published as the counter electrode for the CHI127 EQCM cell. CH Instruments pair it with the CHI128 reference electrode to give that cell its full electrode complement.
• CHI130 Thin-Layer Flow Cell: CHI130 is the thin layer flow cell in the CH Instruments accessory range, photographed on the accessory list as the CHI130 Flow Cell. CH Instruments publish a set of parts that go with it: glassy carbon, gold and platinum working electrodes as CHI131, CHI132 and CHI133, a reference electrode as CHI134, and a 25 mm spacer as CHI135.
• CHI131 GC Working Electrode for Flow Cell: A glassy carbon working electrode cut for the CHI130 thin layer flow cell. CH Instruments list it beside the CHI132 gold and CHI133 platinum versions as the three working electrode materials available for that cell.
• CHI132 Au Working Electrode for Flow Cell: CHI132 is the gold working electrode option for the CHI130 thin layer flow cell. It is one of three flow cell working electrode materials CH Instruments publish, the others being glassy carbon as CHI131 and platinum as CHI133.
• CHI133 Pt Working Electrode for Flow Cell: Platinum is the working surface of this flow cell electrode, listed as CHI133 for the CHI130 thin layer flow cell. CH Instruments offer it alongside the CHI131 glassy carbon and CHI132 gold electrodes for the same cell.
• CHI134 Reference Electrode for Flow Cell: CHI134 is the reference electrode built for the CHI130 thin layer flow cell, with a polyacetal plastic body that CH Instruments describe as having good mechanical tolerance and chemical resistance. The centre wire is silver and the tip, 4 mm long and 3.4 mm in diameter, acts as the liquid junction through a VYCOR glass frit. The published specification states it is made for organic solvent and suits mild solvents such as acetonitrile, that the electrolyte may be changed for HPLC use, and that the plastic does not stand up to strong solvents such as THF.
• CHI135 25 mm Spacer for Flow Cell: CHI135 is the 25 mm spacer CH Instruments publish for the CHI130 thin layer flow cell. It is the only accessory in this group listed in packs, the published unit being four per pack.
• CHI140A Spectroelectrochemical Cell: CHI140A is the spectroelectrochemical cell kit in the CH Instruments range, built around a thin layer quartz glass cell. The published kit sheet lists a platinum gauze working electrode, a platinum counter electrode, a Teflon cap and a 10 cm ETFE purge tube alongside the cell body. No reference electrode is included: CH Instruments name 012167 for aqueous Ag/AgCl work and 012171 for non-aqueous Ag/Ag+ work as the options.
• CHI150 Calomel Reference Electrode: Published in full as the CHI150 Saturated Calomel Electrode (SCE), this reference electrode works on Hg2Cl2 + 2e = 2Hg + 2Cl- and is quoted at 0.241 V against NHE at 25 C. Its saturated KCl filling solution meets the test solution through a ceramic liquid junction, and the published drawing gives a 9.0 mm diameter upper chamber 37 mm long over a 5.3 mm diameter lower stem 50 mm long. CH Instruments instruct users to top up with saturated KCl when the level falls and to store the electrode dipped in saturated KCl after use.
• CHI151 Mercury/Mercurous Sulfate Reference Electrode: The CHI151 is the mercury / mercurous sulfate reference electrode in the CH Instruments range, running on Hg2SO4 + 2e = 2Hg + SO4 2- at a published 0.64 V against NHE at 25 C. Saturated K2SO4 is the filling solution and a ceramic liquid junction carries the contact, with the published drawing showing a 9.0 mm diameter chamber 37 mm long above a 5.3 mm diameter stem 50 mm long. CH Instruments direct users to refill with saturated K2SO4 and to store the electrode standing in the same solution.
• CHI152 Alkaline/Mercury Oxide Reference Electrode: Built as Hg/HgO/1M NaOH, the CHI152 is the reference electrode CH Instruments publish for highly alkaline electrolytes, quoted at 0.098 V against NHE at 25 C for HgO + H2O + 2e = Hg + 2OH-. Its outer body is Teflon, which CH Instruments state keeps it strong in high alkaline solution, and users may swap the 1M NaOH for 6M NaOH or 6M KOH provided the concentration stays at or below 6M. The chamber ships filled with distilled water for transport safety and must be refilled before first use, and the published drawing gives an 11 to 15 mm diameter head 40 to 45 mm long over a 6.4 mm diameter stem 60 to 65 mm long ending in a white ceramic junction.
• CHI172-xxx Electrode leads for model number xxx: CHI172-xxx is the generic ordering code for a set of electrode leads, where xxx is replaced by the instrument model number, for example 600 or 710B. CH Instruments publish one photograph for the CHI172 electrode leads covering the family. Separate part numbers exist where a particular series needs its own lead set.
• CHI172-1000 Electrode leads for CHI1000 Series model number: This is the electrode lead set CH Instruments list for CHI1000 Series model numbers. It is one of four series specific variants of the CHI172 lead family, the others covering the CHI1000A, the CHI1000B and the CHI684 multiplexer.
• CHI172-1000A Electrode leads for CHI1000A Series instrument model number: CH Instruments list CHI172-1000A as the electrode leads for CHI1000A series instrument model numbers. It replaces the general CHI172-xxx ordering code where the CHI1000A series calls for its own lead set.
• CHI172-1000B Electrode leads for CHI1000B Series instrument model number: Electrode leads catalogued for CHI1000B series instrument model numbers. CH Instruments publish it as a distinct part from the CHI1000 and CHI1000A lead sets in the same CHI172 family.
• CHI172-684 Electrode leads for CHI684 multiplexer: CHI172-684 is the electrode lead set for the CHI684 multiplexer. CH Instruments describe the CHI684 as a multi-channel multiplexer for the 400B/C, 600D/E/F, 700D/E/F, 800B/C/D, 900C/D and 1100B/C/D series that switches four lines and addresses up to 64 cells, one at a time.
• CHI173-xxx Printed paper user manual for instrument model xxx: CHI173-xxx is how CH Instruments catalogue a printed paper user manual, with xxx standing for the instrument model number it covers. It is ordered as a separate accessory line item against a given instrument.
• CHI201 Picoamp Booster: CHI201 is the picoamp booster on its own, the current measuring half of the CHI200(B) Picoamp Booster and Faraday Cage. CH Instruments state that current down to a few picoamperes can be read with it, that its sensitivity matches the 1x10^-12 A/V of the 600B/C/D/E series internal range but at a lower bias current, and that placing the preamplifier close to the electrode lowers noise. Detection and switching are automatic: the booster enables itself at sensitivity scales of 1e-8 A/V and below, stands down for automatic sensitivity switching techniques such as Tafel plots and bulk electrolysis and for galvanostatic techniques, and works with AC impedance. On a bipotentiostat it affects the primary channel only.
• CHI202 Faraday Cage: The faraday cage is catalogued separately as CHI202 and forms the screening half of the CHI200(B) Picoamp Booster and Faraday Cage. CH Instruments state that it removes electrical interference, line frequency noise in particular, and that it also makes relatively fast measurements of small currents possible. Where an electrochemical cell is picking up noise from its surroundings, CH Instruments recommend adding the cage.
• CHI220 Simple Cell Stand: CHI220 is the simple cell stand in the CH Instruments range, made of stainless steel and Teflon and shown in two published figures. Four glass cells are included with it. CH Instruments note that the stand is not remote-controllable.
• CHI221 Cell Top: CHI221 is a cell top supplied with a platinum wire counter electrode already fitted. CH Instruments state explicitly that it is not a replacement part for the CHI220 Simple Cell Stand.
• CHI222 Glass Cell: CHI222 is the glass cell listed singly on the CH Instruments accessory list. Four cells of this kind ship with the CHI220 Simple Cell Stand, so the part covers additional or replacement cells for that hardware.
• CHI223 Teflon Cap: A Teflon cap catalogued as CHI223 within the CH Instruments cell hardware group. It carries the same published note as the CHI221 cell top: it is not a replacement part for the CHI220 Simple Cell Stand.
• 011066 Cable Kit for IDA electrode: Part 011066 is the cable kit CH Instruments list for connecting an IDA interdigitated array electrode. The IDA datasheet CH Instruments publish describes the cable kit as a substitute for the connecting part of an IDA electrode and names a connecting cable, an electrode fixer and a mini vice as its components. The same document warns that IDA electrodes are quartz glass and should be handled carefully when inserted and removed.
• 012125 IDA Gold Electrode: 012125 is the gold interdigitated array electrode in the CH Instruments accessory range. The published IDA datasheet gives 65 pairs of interdigitated generator and collector bands, each 10 micron wide, 2 mm long and separated by a 5 micron interval, which drive continuous redox cycling between the two sets of bands. CH Instruments state that this cycling raises the sensitivity of the electrode markedly and that dual mode preserves the sample compared with single mode. The 011066 cable kit is listed for connecting it.
• 012126 IDA Platinum Electrode: The platinum version of the interdigitated array electrode, catalogued by CH Instruments as 012126. Its published geometry matches the rest of the IDA family: 65 pairs of generator and collector bands of 10 micron width, 5 micron interval and 2 mm length. Redox cycling between the interdigitated bands is what raises the measured signal, and the 011066 cable kit provides the connection.
• 012127 IDA Carbon Electrode: 012127 is the carbon interdigitated array electrode CH Instruments list alongside the gold and platinum versions. The published datasheet quotes the same array for all materials, 65 pairs of bands 10 micron wide and 2 mm long at a 5 micron interval. It connects through the 011066 cable kit and is handled with the care the datasheet asks for quartz glass electrodes.
• 012167 Ag/AgCl Reference electrode for CHI140A: Part 012167 is the silver / silver chloride reference electrode CH Instruments list for the CHI140A spectroelectrochemical cell, published in the CHI140A kit sheet as the RE-1B reference electrode. The CHI140A ships without a reference electrode, so this part or the non-aqueous 012171 has to be ordered with it.
• SE101 3 mm diameter Printed carbon electrode (single working electrode) for aqueous solutions: SE101 is a screen printed carbon electrode in the single working electrode configuration, published with a 3 mm working diameter and a working area of 0.071 cm2 for aqueous solutions. CH Instruments list it in packs of 40 and describe the screen printed range as disposable or reusable, needing no electrode polishing, open to chemical modification, and extendable in applicability after preanodisation. It sits between the 5 mm SE100 and the 1.5 mm SE102 in the published single electrode series.
• TE100 Printed Electrodes (3-electrode configuration) for aqueous solutions: TE100 is the screen printed electrode with a built in three electrode configuration, carrying working, reference and counter electrodes plus an insulated layer and contacts on one strip. CH Instruments publish a 3 mm working diameter and a 0.071 cm2 working area for it and supply it in packs of 40 for aqueous solutions. It is the largest of the three built in three electrode sizes, ahead of the 2 mm TE101 and the 1.5 mm TE102.
• 002417 GCE Glassy carbon electrode OD:10mm ID:5.0mm: Part 002417 is a glassy carbon electrode published with an outside diameter of 10 mm and an inside diameter of 5.0 mm. CH Instruments list it as a separate glassy carbon electrode alongside the 3 mm CHI104 working electrode.