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Jola Spezialschalter K. Mattil
& Co. KG
Klostergartenstraße 11-20 D-67466 Lambrecht Phone: +49 63 25 / 188-01 |
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Jola Spezialschalter K. Mattil
& Co. KG
Klostergartenstraße 11-20 D-67466 Lambrecht Phone: +49 63 25 / 188-01 |
Liquid level indicator
TSK 4-20/E
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Consisting of - sensor: Potentiometer adjusted by float via a transmission chain. - transmitter: A 2-wire module in the terminal box of the liquid level indicator converts the potentiometer position into a load-independent current signal 4...20 mA. Float suitable for use in liquids with a specific density >=0.7 g/cm³ |
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| Brochure Continuous liquid level measuring with liquid level transmitter TSQ 4-20/… and TSK 4-20/… [PDF] | |
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| Sensor Probe tube material |
stainless steel 316 Ti |
| Probe tube diameter max. | 28 mm |
| Probe tube length max. | 6,000 mm |
| Screw-in nippel material | stainless steel 316 Ti |
| Screw-in nippel dimension | G1¼ |
| Float material | stainless steel 316 Ti |
| Float form | cylindrical float |
| Float diameter | 148 mm |
| Float length | 150 mm |
| Terminal box |
A 113, polyester, glass fibre reinforced, 160 x 160 x 90 mm, protection class IP 65 |
| Mounting orientation | vertical |
| Mounting | from the top |
| Temperature application range |
0° C to + 100° C (inside the terminal box: 0° C to 60° C), other temperature application range on request |
| Pressure resistance |
at + 20° C:
in line with the float used
- cylindrical float 148 mm dia. x 150 mm high, up to 5 bar
- cylindrical float 240 mm dia. x 190 mm high, up to 5 bar
- ball float 180 mm dia., up to 25 bar
For a specific density d >= 1 g/cm³:
- oval float 200 mm dia. x 100 mm high, up to 10 bar
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| Measuring principle |
the magnet of the float leads to a change in resistance via a second magnet, a transmission chain, a gear and a potentiometer. This provides a quasi-continuous height- proportional measuring signal Measuring precision: continuous depending on the position of the potentiometer |
| Transmitter |
Measuring electronics: 2 wires (independent of polarity) Setting possibility: 0% value not adjustable, 100 % value adjustable via a potentiometer Power supply: DC 15 - 30 V (independent of polarity) Measuring signal: 4 ... 20 mA Admiss. load in the current loop: max. 200 ohm at 15 V; max. 900 ohm at 30 V Connecting terminals: for max. 2.5 mm² solid cable or max. 1.5 mm² flexible cable |
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Probe tube length: according to customer's specifications within the max. tube length |
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Mode of operation A float with built-in permanent magnet moves up and down on the probe tube of the TSK 4-20/... liquid level indicator with the liquid level. Inside the probe tube, there is a second magnet integrated in a circulating endless chain inside the bigger of the two guide tubes. The magnet follows the float magnet and therefore the liquid level. This in turn moves the endless chain, which then acts on a potentiometer via a gear in the terminal box of the TSK 4-20/... liquid level indicator. This results in continuous height-proportional resistance measurement. The change in resistance resulting from the upward and downward motion of the float is recorded via a transmitter in the terminal box of the TSK 4-20/... liiquid level indicator and converted into a load-independent current 4 ... 20 mA. Area of application The TSK 4-20/... liquid level indicator is designed for use in low-viscosity liquids or liquids with only low solid content in open or closed tanks. It is not suitable for use in liquids that are prone to deposit formation, adhesion or crystallisation which might hinder the movement of the float on the probe tube. It is also not suitable for use in liquids with permanently moving surface and/or on vibrating machines. EMC: for interference emission in accordance with the appliance-specific requirements for households, business and commerce as well as small companies, and for interference immunity in accordance with the appliance-specific requirements for industrial companies.
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| Measure drawing |
| Measure drawing 2 |
| Basic circuit |
| Top |