Specifications
- Function
- capacitive level switch (minimum, maximum or intermediate)
- Measuring ranges
- probe–tank capacitance up to 1000 pF; sensitivity 1%; switching delay 0.5–10 s
- Outputs / interface
- relay, 2 A / 220 V / 80 VA
- Power supply
- 220 V ±10%, 48–60 Hz
- Power consumption
- 12 VA
- Dimensions
- BAC 215 × 105 × 80 mm; BTS 140 × 110 × 88 mm
Sources: [2]
Description
The N2501 is an electronic level switch (nivostat), made by IEMI in Bucharest [1]. IEMI’s production table lists 2,124 units made in 1981–1985 [1].
Annex III.2.11 describes it as a technologically modernised version of the NTS-T with a wider range of uses, for automating the filling and emptying of vessels in the chemical and food industries. It had a supply-and-control unit (BAC) and a transducer-probe unit (BTS); the capacitive probe was 250, 450 or 650 mm long, insulated with polypropylene and Teflon or with Teflon only, and probes of 1 to 8 m could be supplied on request. It was intrinsically safe (Ex i a), protected to IP 54, and worked at tank pressures of up to 15 daN/cm² and temperatures of up to 70 °C, or 130 °C with a thermal insulator [2].
Gallery
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Schematics
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Documents
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References
- [1]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, sections III.2 „Producția IEMI” and III.3 „Comentarii tehnico-economice”, pp. 302–317, and annex III.2.3 „Producția IEMI – aparate electronice de măsură și industriale”, pp. 383–386
- [2]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, annex III.2.11 „Aparate pentru măsurarea mărimilor neelectrice”, pp. 647–655