Serie KPInterruttore di livello a sonda (galleggiante verticale)

Interruttore a galleggiante compatto a sonda, a orientamento verticale — il corpo esterno da 25 mm di diametro entra in un tubo o pozzo da 25.4 mm. Corpo in UPVC con sfiato e galleggiante interno in polipropilene. Ripetibilità di commutazione di ±1 mm; ideale in alternativa alle sonde di conducibilità nelle pompe sommerse per pozzo.

Serie KP

Caratteristiche

  • Nessuna parte mobile esterna
  • Costruzione solida e affidabile
  • Interruttore reed S.P.D.T. a tre fili
  • Costruzione in PVC, polipropilene e fluorosilicone
  • Azione di commutazione stabile e ripetibile
  • Nessun componente con mercurio o piombo
  • Diametro compatto di 25 mm — entra in un tubo / pozzo da 25.4 mm
  • Ripetibilità di commutazione di ±1 mm
  • Immersione massima 45 m (pressione statica 450 kPa)
  • pH 1–14, parti bagnate in UPVC e polipropilene
  • Pesi opzionali per cavo disponibili

L’interruttore di livello a sonda KP è costituito da un involucro in UPVC con sfiato che contiene un galleggiante in polipropilene. Il livello crescente del liquido solleva il galleggiante e aziona un interruttore reed ad accoppiamento magnetico situato nella testa; un livello in discesa lascia ricadere il galleggiante e disattiva l’interruttore reed. La testa del sensore è lavorata a CNC da UPVC pieno ed è completamente annegata nella resina. L’interruttore è un reed a contatto secco unipolare a due vie ad alta flessibilità, in grado di commutare fino a 140 VAC o 150 VDC con correnti fino a 0.25 A con carico resistivo, fino a un massimo di 5 Watt / VA. Non è adatto all’uso a tensione di rete: è un dispositivo di segnalazione a bassa tensione per ingressi BMS e PLC, e un’alternativa alle sonde di conducibilità nelle installazioni con pompe sommerse per pozzi. Deve essere installato in verticale con il cavo in alto.

Ulteriori informazioni

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Ordini — modelli disponibili

Codice modelloDescrizione
KP-10KP probe switch — 10 m of CPE cable (the only length available)

Limiti di funzionamento

Maximum submergence45 m / 450 kPa static pressure
Minimum burst pressure3500 kPa or 350 m static pressure
Maximum liquid temperature50 °C
Minimum liquid temperature-1 °C
Liquid specific gravity> 0.9
Liquid pH range1 to 14
Smallest hole/well diameter25.4 mm internal diameter, vertically oriented
Liquid level change for switch to operate5 mm (on to off or off to on)
Closest switching point to tank floor80 mm
Smallest opening through which the switch will fit25.4 mm diameter
Suitability — sea waterFully compatible
Suitability — potable waterFully compatible
Switching repeatability±1 mm liquid level change
Mounting orientationMust be installed within 5° of vertical

Dati elettrici

Switch typeDry contact reed switch
Contact formS.P.D.T. (single-pole double-throw) C-form, break-before-make
Maximum switched voltage140 VAC / 150 VDC
Maximum switched current0.25 A
Maximum switched power5 W / VA — IMPORTANT: the product of switching voltage and current must never exceed 5 W
Carry current1 A max
Breakdown voltage200 VDC minimum
Typical applicationsPLC, telemetry & general low voltage control

Dimensioni

Dimensioni di Serie KP
Vertical probe — 173 mm long, 25 mm diameter body, 21.5 mm diameter at the cable end, 7 mm diameter cable.

Typical Applications

Deep-well bore-pump protection (borehole installations); saline-water service; withstands most common chemicals; chemical-tank monitoring; bilge-level control; high & low level alarms; intrinsically safe circuits (simple apparatus); general-purpose liquid-level sensing.

Hazardous Areas

The KP is simple apparatus under AS/NZS 60079.11 and may be used in a hazardous area only as part of an intrinsically safe circuit, connected through suitably certified associated apparatus. It is not Ex certified in its own right. The full conditions of use are given in the installation sheet.

Safety — Low Voltage Only

The KP probe level switch is not suitable for use at mains voltage and must never be used in mains voltage applications. It is a low voltage signalling device for low voltage, low current applications only, and is ideal as an input device for BMS and PLC applications. Its reed switch suits low wetting current, low voltage control such as PLC and BMS control at 24 V, 3.3 V and 5 V, signalling and telemetry, and relay logic circuits. It is not suitable for switching inductive loads such as high wattage relays, motors of any kind or contactors. The contact power rating is the product of switching voltage and current and must never exceed 5 Watts / VA.

Mounting — vertical only

The KP probe MUST be installed vertically (within 5 degrees of vertical) with its cable at the top. It will not operate in any other orientation. It does not need to float or tilt to operate; its float is contained within the vented UPVC housing. Four mounting methods: (A) a rigid probe assembly made from 15 NB PVC pressure pipe and a PVC socket, fixed to a wall with the 15 NB pipe saddles supplied with the switch; (B) strapped to suitable pipework with standard cable ties, using the locating trenches in the KP body; (C) suspended vertically in a pit or tank, with a Kelco KCW cable weight fitted to the cable to hold the switch in place if required; (D) bolted to the side wall of a pit or tank using the 15 NB wall clips provided with the switch. The 15 NB probe assembly protects the cable from mechanical and chemical damage. Avoid violent turbulence and any place where the switch or cable can abrade against adjacent objects.

Magnet — Ferric and Iron Particles

The KP probe switch contains a magnet. Do not use it in applications involving ferric solutions such as ferric chloride, or liquids containing suspended iron particulates: iron sludge may agglomerate around the magnet and prevent the free movement of the float.

Cable Data

S05RN-F 3 × 0.75 mm² cable: black CPE (chlorinated polyethylene) outer sheath, fluorosilicone cable boot, EPR insulation, 3 × 24/0.2 mm plain copper (0.75 mm²), 7.0 ± 0.2 mm diameter, core colours blue (common), black (normally closed) and brown (normally open), voltage rating 300 / 500 V, test voltage 2000 V / 2500 V, minimum bending radius 6 × overall diameter (42 mm), conductor operating temperature -30 °C to +60 °C (85 °C max), CENELEC HD 22.4 S4 & VDE 0282-4/2005, conductor resistance 26.7 Ω/km max per core (20 °C), cable current rating 6 A max (switch ratings apply), maximum suspended length approx. 45 m free-hanging cable. The cable is 10 m only; no other lengths are available. Blue to brown closes and blue to black opens as the liquid level rises.

Manutenibilità

Il KP può essere smontato per la pulizia, se necessario. I gruppi sonda di ricambio sono disponibili presso Kelco Engineering o il Suo distributore.

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