TW 7200 – Rotary Sample Changer for Piston Burettes and Automatic Titrators
The number of samples to be processed is growing constantly while at the same time the demands on reliability are increasing in accordance with GLP and ISO standards. The SI Analytics Sample Changer (TW 7200) helps you meet these increased requirements and free up highly qualified employees from routine work.
Depending on your application, the Sample Changer from SI Analytics can be customised with sample trays of varying size as well as a rinsing pump. Sample trays are available with 12, 16, 18, 24, and 48 positions for accommodating sample vessels with a diameter of 28-82mm.
The number of samples to be processed is growing constantly while at the same time the demands on reliability are increasing in accordance with GLP and ISO standards. The SI Analytics Sample Changer (TW 7200) helps you meet these increased requirements and free up highly qualified employees from routine work.
Depending on your application, the Sample Changer from SI Analytics can be customised with sample trays of varying size as well as a rinsing pump. Sample trays are available with 12, 16, 18, 24, and 48 positions for accommodating sample vessels with a diameter of 28-82mm.
The Sample Changer (TW 7200) is controlled by your PC (not supplied) and SI Analytics’ TitriSoft software (sold separately). The TitriSoft titration software is the optimum solution for your titration tasks. The software supports your daily work procedures during sample preparation, titration and evaluation of results.
Exchangeable sample trays for more flexibility
With sample trays or racks and titration head fittings for a variety of beaker and titrator vessels, you get the flexibility your lab needs.
The sample trays and titrator heads are very quick and simple to change. You can conveniently set the respective tray size in the TitriSoft software’s worklist without any need for configuration of the sample changer itself.
Rinsing of electrode and titration tip
To ensure the accuracy of the results, electrodes, and titration tips are rinsed after each titration. This can be done by immersing the electrodes and titration tips in a rinsing solution. How many rinsing positions are to be used and how long rinsing is to be carried out is defined in the worklist.
A direct and fast rinsing of the electrodes and titration tips can be carried out by connecting the MP 25 rinsing pump. This involves rinsing directly after the titration either into the titrated sample (TW 7200-16-MP, TW 7450-42-MP) or into a special rinsing vessel at position one (TW 745048-MP and TW 7450-72-MP).
Finally, a waiting position can be approached to immerse pH electrodes in a KCl solution and prevent them from drying out.
By using an optional second pump, the titrated solution as well as the rinsing solution can be aspirated.
Photo on the left-hand side: The connection of a rinsing nozzle in the TZ 3974 titration head now also enables rinsing on the first position into a special rinsing vessel. The rinsing liquid drains from the rinsing vessel into a waste vessel by gravity.
Stirring “from above” or “from below”
Two magnetic stirrers allowing the samples to be stirred “from below” are installed in the TW 7200 as a standard.
Alternatively, you can use a rod stirrer which allows stirring “from above”.
Automatic COD titration
For the direct titration of the chemical oxygen demand (COD) in the digestion vessels, a special sample tray with twenty-four positions and a matching titration head are available for the TW 7200.
Titration heads and sample trays
Due to the built-in head motor of the TW 7200, double-row sample trays can be used in place of single-row versions simply by switching them over. No need for any special adaptations or modifications. Examples, from left to right:
TZ 4016, single-row,16 sample positions
TZ 4025, double-row, 25 sample positions
TZ 4038, double-row, 38 sample positions
TZ 4050, double-row, 48 sample positions
Titration head TZ 1464
Suitable for the TZ 4018 and TZ 401 sample trays with 18 and 28 positions for 100 ml beakers. Four openings are available for electrodes, titration tips and the rod stirrer.
Titration head TZ 1467 with splash shield and rinsing nozzle
Suitable for the TZ 4012, TZ 4016 and TZ 4025 sample trays from 12 to 25 positions for 150 ml to 400 ml beakers.
Six openings are then still available for electrodes, titrationtips and the rod stirrer.
Titration head TZ 1463
Suitable for TZ 4012, TZ 4016, TZ 4025 and TZ 4053 sample trays from 12 to 25 positions for 150 ml to 600 ml beakers.
The titration head is also used for the TZ 4030, TZ 4050 and TZ 4058 sample trays for special dosing tasks such as sample preparation. A total of seven openings are available for electrodes, titration tips and the rod stirrer.
New: Titration head TZ 1469 for 24 and 38 position sample trays
The TZ 1469 micro-titration head now also allows the simultaneous use of a conductivity and a pH electrode (micro version such as SCPpHT-MIC-AMF-3MDIN-N, 285101335) and rod stirrer.
Without a rod stirrer, a standard pH electrode with 12 mm diameter can also be used. Titration tips can be accommodated in the head too.
Key Features of TW 7200
- Titration heads and sample trays can be easily changed
- Interchangeable Sample trays (12 – 48 positions)
- Stirring from below is possible with the two built-in magnetic stirrers or from above with an optional rod stirrer (propeller stirrer)
- The size of the sample tray is set in TitriSoft
- Built-in horizontal titration head motor for positioning in another sample row
- Connection of two pumps (diaphragm and peristaltic pumps) for rinsing of the electrodes and titration tips and for the suction of the sample
- pH electrode calibration can be done on the sample changer.
Specifications of TW 7200
| Specifications | |
|---|---|
|
Interfaces: |
2 × RS-232-C, 1 x I/O, 2 x pumps, 1 x stirrer, 1 USB-A (Update only), 1 USB-Mini-B (PC), 1 x Ethernet |
|
Housing Material: |
Housing made of two-component- coated ALU, steel sheet, and epoxy resin |
|
Dimensions:
|
Basic unit: 143 x 620 x 505 mm (W x H x D) |
|
Weight:
|
10,3 Kg Examples with sample trays |
|
Ambient conditions: |
Ambient temperature: + 10 ... + 40 °C for operation and storage Humidity according to EN 61 010, Part 1: max. relative humidity 80 % for temperatures up to 31 °C, linear decrease down to 50 % relative humidity at a temperature of 40 °C |
|
Power supply: |
115 - 240 V~, 50/60 Hz, 30 VA |
|
Magnetic stirrer: |
2 fixed magnetic stirrers |
|
Horizontal motor: |
Horizontal motor for driving a second sample beaker row |
|
Sample trays: |
From 12 - 48 positions |
Ordering Information TW 7200 Sample Changers (Basic Unit)
| Type No. | Order No. | Description |
|---|---|---|
|
TW 7200 |
285228000
|
Basic unit TW 7200 with two integrated magnetic stirrers, connection cable for rod stirrer, USB connection cable TZ 3887, power supply 100–240 V
|
|
TW 7200-16
|
285228010
|
Basic unit TW 7200 with sample rack TZ 4016 for 16 samples, without beakers, incl. titration head TZ 1463 and power supply 100–240 V |
|
TW 7200-18 |
285228020
|
Basic unit TW 7200 with sample rack TZ 4018 for 18 samples, without beakers, incl. titration head TZ 1464 and power supply 100–240 V |
|
TW 7200-24 |
285228030 |
Basic unit TW 7200 with sample rack TZ 4024 for 24 samples, without beakers, incl. titration head TZ 1469, power supply 100–240 V |
|
TW 7200-COD |
285228040 |
Basic unit TW 7200 with sample rack TZ 4040 for 24 CSB-samples according to DIN 38 409, without vessels, incl. Titration head TZ 1461, redox electrode Pt 5901, rod stirrer TZ 1846, titration tip TZ 1648, power supply 100–240 V |
|
TW 7200-16-MP |
285228050 |
Basic unit TW 7200 with sample rack TZ 4016 for 16 samples, without beakers, incl. titration head TZ 1467, rinsing pump MP 25, power supply 100–240 V |
|
TW 7200-25 |
285228200 |
Basic unit TW 7200 with sample rack TZ 4025 for 25 samples, without beakers, incl. titration head TZ 1463 and power supply 100–240 V |
|
TW 7200-25-MP |
285228210 |
Basic unit TW 7200 with sample rack TZ 4025 for 25 samples, without beakers, incl. titration head TZ 1467, rinsing pump MP 25, power supply 100–240 |
Ordering Information TW 7200 Sample Changers (Sets)
| Type No. | Order No. | Description |
|---|---|---|
|
TL 7000 TW 7200-16 Set |
285228060 |
Complete sample change set consists of TL 7000-M2-20, sampler changer TW 7200-24 and 3 x beaker sets TZ 1783, titration tip TZ 1646 and titration tube TZ 3415; incl. Software TitriSoft |
|
TL 7000 TW 7200-24 Set |
285228070 |
Complete sample change set consists of TL 7000-M2-20, sampler changer TW 7200-24 and 3 x beaker sets TZ 1783, titration tip TZ 1646 and titration tube TZ 3415; incl. software TitriSoft |
Ordering Information TW 7200 Trays/Racks and Titration Heads
| Type No. | Order No. | Description |
|---|---|---|
|
TZ 4012 |
285228080 |
Sample tray for TW 7200, for 12 sample vessels, incl. 20 beakers, 250 ml, low form |
|
TZ 4016 |
285228090 |
Sample tray for TW 7200 for 16 sample vessels without beakers. Suitable beakers are 150 ml TZ 1784, TZ 1788 or 250 ml TZ 1787, TZ 1780. |
|
TZ 4018 |
285228100 |
Sample tray for TW 7200, for 18 sample vessels without beakers. Suitable beakers are TZ 1765 (100 ml tall form without spout) |
|
TZ 4024 |
285228110 |
Sample tray for TW 7200, for 24 sample vessels without beakers. Suitable beakers are 50 ml TZ 1783 / 75 ml TZ 1786 |
|
TZ 4025 |
285228120 |
Sample tray for TW 7200, double row for 25 sample vessels, without beakers. Suitable beakers are 150 ml TZ 1784, TZ 1788 or 250 ml TZ 1787, TZ 1780 |
|
TZ 4028 |
285228130 |
Sample tray for TW 7200, double row for 28 sample vessels, without beakers. Suitable beakers are TZ 1765 (100 ml tall form without spout) |
|
TZ 4030 |
285228140 |
Sample tray for TW 7200, for 24 sample vessels, without vessel. Suitable for 40 ml sample vials with ND 24 VZ 7088 |
|
TZ 4038 |
285228150 |
Sample tray for TW 7200, double row for 38 sample vessels, without beakers. Suitable beakers are 50 ml TZ 1783 / 75 ml TZ 1786 |
|
TZ 4040 |
285228160 |
Sample tray for TW 7200, for 24 COD vessels according to DIN 38 409, without vessels |
|
TZ 4050 |
285228170 |
Sample tray for TW 7200, double row for 48 sample vessels, without vessels. Suitable for 40 ml sample vials with ND 24 VZ 7088 |
|
TZ 4053 |
285228180 |
Sample tray for TW 7200, for 12 sample vessels, incl. 20 beakers 600 ml, tall form |
|
TZ 4058 |
285228190 |
Sample tray for TW 7200, for 16 sample vessels, without bottles. Suitable for 100 ml laboratory bottles VZ 7081 |
|
TZ 1461 |
285213622 |
Titration head for COD sample tray for TW 7200 |
|
TZ 1462 |
285213639 |
Titration head for KF titration for sample tray TZ 4024 or TZ 4038 for TW 7200 |
|
TZ 1463 |
285213647 |
Titration head for sample tray TZ 4012 and sample tray TZ 4016/TZ 4025, as well as TZ 4030, TZ 4050, TZ 4053 and TZ 4058 with 7 openings NS 14 |
|
TZ 1464 |
285213654 |
Titration head for sample tray TZ 4018/TZ4028 with four openings with different diameters |
|
TZ 1467 |
285213671 |
Titration head for sample tray TZ 4012/TZ 4016/TZ 4025 with 7 openings NS 14 incl. splash shield and rinsing tube |
|
TZ 1469 |
285213884 |
Titration head for sample tray TZ 4024 and TZ 4038 with 5 x openings (1 x NS 14, 1 x 15.3 mm and 2 x NS 7 + 1 x 3 mm for FEP-tubes). With adapter TZ 1526 for 12 mm standard electrodes |
Ordering Information: Other Accessories
| Type No. | Order No. | Description |
|---|---|---|
|
TZ 1465 |
285213980 |
Cap made out of plastic, with opening for titration vessel TZ 1786, 12 pcs. |
|
TZ 1466 |
285213990 |
Aluminium foil for titration vessel TZ 1786, 500 pcs. |
|
TZ 1785 |
1064589 |
Glass titration beaker, 250 ml low form (10 pcs.) for TZ 1452/TZ 4012 |
|
TZ 1783 |
1064720 |
Glass titration beaker, 50 ml tall form (10 pcs.) for TZ 1454/TZ 4024/TZ 4038 and TZ 3972 |
|
TZ 1787 |
285201994 |
Glass titration beaker, 250 ml tall form (10 pcs.) for TZ 1459/TZ 4016/TZ4025 and TZ 3942 |
|
TZ 1788 |
285202008 |
Glass titration beaker “super duty", 150 ml low form (10 pcs. for TZ 1459/TZ 4016/TZ4025 and TZ 3942 |
|
TZ 1765 |
285202030 |
Glass titration beaker, 100 ml tall form (10 pcs.) without spout |
|
TZ 1784 |
285216747 |
Glass titration beaker, 150 ml low form (10 pcs.) for TZ 1459/TZ 4016/TZ4025 and TZ 3942 |
|
TZ 1786 |
285216756 |
Beaker made out of glass for max. 75 ml; diameter 40 mm, height 110 mm (10 pcs) for TZ 1454/TZ 4024/ TZ 4038 and TZ 3972 |
|
TZ 1780 |
285226140 |
Glass titration beaker “super duty", 250 ml tall form (10 pcs. For TZ 1459/TZ 4016/TZ4025 and TZ 3942 |
|
TZ 1766 |
285226160 |
Glass titration beaker, 600 ml tall form (10 pcs.) without spout |
|
TZ 1844 |
285213199 |
Rod stirrr mid-size model (120 mm) with NS 14.5 |
|
TZ 1846 |
285215134 |
Rod stirrer long model (200 mm) with NS 14.5 for COD reaction vessels according to DIN 38 409 section 41 for sample changer TW 7200 |
|
TZ 1847 |
285215175 |
Rod stirrer short model (103 mm) with NS 14.5 |
|
TZ 1863 |
285216530 |
Propeller blade three-fold made of PTFE |
More Information
Get more information and English manual for this Sample Changer for Piston Burettes and Automatic Titrators here!
