TC Control Reedchain Transmitter are a reliable and simple solution to provide your process with a 4-20mA output. The transmitters comprise of a chain of switches evenly spaced at intervals of 5mm, 10mm or 20mm gaps, as the float moves along this chain, the magnetic field generated by the float closes the reed switches changing the resistance in the circuit,  the resistance output is proportional to the level of the liquid.
The TC Fluid Control reedchain transmitter are more economical than alternatives over short distances- it’s externally mounted so can easily be removed or added whenever necessary and is also relatively maintenance free. They can be supplied with a local LCD display along with the 4-20mA output for remote indication of the liquid level.
TC Control Reedchain Transmitter Application
An approval has been issued for KTX125… or KTX Level Transmitters … as defined in EC Directive 94/9/EC (equipment and protective systems for use in potentially explosive atmospheres).
Technical Data
When using KTX125… or KTX level transmitters please observe the mounting and operating instructions of other system components (e.g. Magnetic level gauge). Ignition protection KTX125… : II 1/2G Ex ia IIC T4…T6; II 2 D Ex ibD 21 IP6x T80°C Float and guide tube, zone 0 Ignition protection KTX… : II 2G Ex ia IIC T4…T6; II 2 D Ex ibD 21 IP6x T80°C or II 2G Ex ib IIC T4…T6; II 2 D Ex ibD 21 IP6x T80°C
Applied Standards:
EN 60079-0:2006Â Â Â Â Â Â Â Â Â Â Â Â Â EN 60079-11:2007Â Â Â Â Â Â Â Â Â Â Â Â Â EN 60079-26:2007
EN 61241-0:2006Â Â Â Â Â Â Â Â Â Â Â Â Â EN 61241-11:2006
Structure and functional description
KTX125… and KTX Level Transmitters… (in connection with a magnetic level gauge and float) serve the purpose of monitoring liquid levels in containers. These media must not possess any extreme form of soiling or coarse particles and must not tend toward crystallisation. In connection with a control unit or an analysis unit, these Transmitters form a filling level measuring system.
The Transmitters function according to the float principle with magnetic transmission in three-wire potentiometer circuitry or two-wire resistance circuitry. A reed measuring chain (reed contacts + resistors) installed in the transmitter tube is actuated by a permanent magnet installed in the float. This provides a height-proportional resistance signal.
The KTX Transmitter can also be used as part of a position measuring system. The transmitter is then installed in or mounted on a machine or equipment system. Together with a control unit or an analysis unit, this combination then forms a position measuring system. The KTX Transmitters function with magnetic transmission in three-wire potentiometer circuits or two-wire resistance circuits. A reed measuring chain (reed contacts + resistors) installed in the KTX… tube is actuated by a permanent magnet installed in or mounted on the machine or equipment system. This provides a resistance signal proportional to the position.
TC Control Reedchain Transmitter Specifications
*Summary electrical data on KTX125… Level Transmitters variants with approval
| Basic | Code1 | Code2 | Code3 | Code4 | Code5 | Code6 | Code7 | Umax | Imax | Pmax | Tmax | Ignition protection |
| type | Approval / type | |||||||||||
| KTX125 | A | RV2 | VK… | – | L…/12 | V52R | MU | 20V | 50mA | 0,25W | 100ËšC | KEMA 04 ATEX 1232X |
| II 2G Ex ia IIC T4…T6 or II 2G Ex ib IIC T4…T6 | ||||||||||||
| KTX125 | A | RV2 | VK… | TE | L…/12 | V52R | — | 30V | 101mA | 0.758W | 100ËšC | BVS 08 ATEX 019X LCIE 05 ATEX 6006X II 1G Ex ia IIC T4…T6 |
| 29.3V | 107mA | 0.784W | ||||||||||
| KTX125 | A | RV2 | VK… | TLEH | L…/12 | V52R | — | 28.4V | 116mA | 0,824W | ||
| KTX125 | A | RV2 | VK… | T32 | L…/12 | V52R | — | 30V | 130mA | 0.80W | 100ËšC | II 1G Ex ia IIC T4…T6 or II 2G Ex ib IIC T4…T6 |
| KTX125 | A | RV2 | VK… | T53P | L…/12 | V52R | — | 30V | 120mA | 0,84W | 100ËšC | KEMA 02 ATEX 1318 |
| KTX125 | A | RV2 | VK… | T53F | L…/12 | V52R | — | 300mA | 1.3W | II 1G Ex ia IIC T4…T6 |
Summary electrical data on Level Transmitters KTX… variants with approval*
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| Basic type | Code1 | Code2 | Code3 | Code4 | Code5 | Code6 | Umax | Imax | Pmax | Tmax | Ignition protection Approval / type |
| KTX | A… | VK… | … | L../M../.. | EX | MU | 20V | 50mA | 0.25W | 100ËšC | KEMA 04 ATEX 1232X II 2G Ex ia IIC T4…T6 or II 2G Ex ib IIC T4…T6 |
| KTX | A… | VK… | TE | L../M../.. | EX | — | 30V | 101mA | 0.758W | BVS 08 ATEX 019X LCIE 05 ATEX 6006X II 1G Ex ia IIC T4…T6 | |
| 29.3V | 107mA | 0.784W | 100°C | ||||||||
| KTX | A… | VK… | TLEH | L../M../.. | EX | — | 28.4V | 116mA | 0.824W | ||
| KTX | A… | VK… | T32 | L../M../.. | EX | — | 30V | 130mA | 0.80W | 100ËšC | II 1G Ex ia IIC T4…T6 or II 2G Ex ib IIC T4…T6 |
| KTX | A… | VK… | T53P | L../M../.. | EX | — | 30V | 120mA | 0.84W | 100ËšC | KEMA 02 ATEX 1318 II 1G Ex ia IIC T4…T6 |
| KTX | A… | VK… | T53F | L../M../.. | EX | — | 300mA | 1.3W |
Temperatures – Level Transmitters KTX125… or KTX…
| Temperature Class | Max. Process Temperature | Max . Ambient Temperature on Terminal | Surface Temperature ( Dust |
| T4 | 100°C | 60°C | ≤80°C |
| T5 | 65°C | 60°C | |
| T6 | 50°C | 60°C |
Download Datasheet : TC Controls Reedchain Transmitter
Reference : tc-fluidcontrol.com