AECOSC30M-AE25 NO/NC KM30 x 1.5 Capacitive Proximity Sensor, Metal Housing, 0–25 mm Adjustable, 1 A 220 V Changeover Relay Output, Programmable Delay

Product Description

What this part is

This is an M30 x 1.5 barrel-style capacitive proximity sensor with a metal housing, an adjustable sensing distance of 0 to 25 mm, and a programmable relay output. Being capacitive rather than inductive, it detects far more than metal: plastics, glass, wood, cardboard, powders, granulates and liquids all register, which is why capacitive sensors are the standard choice for level control in hoppers, silos and tanks, and for presence detection on non-metallic product.

Relay output stage

Most proximity sensors give a PNP or NPN transistor output: low current, DC only, polarity-dependent, and needing an interface relay to switch a real load. This sensor contains a 1 A, 220 V changeover relay. The output is a volt-free NO/NC contact.

That contact switches a contactor coil, a solenoid valve, a lamp, an alarm or a pump starter directly, on AC or DC, with no interposing relay and no sourcing-versus-sinking convention to observe. On a level-control application it frequently reduces the panel to the sensor and the load. It also drops into older electromechanical control schemes that have no PLC input card.

A relay has a finite mechanical life and a maximum switching frequency far below a solid-state output, so the duty is level, presence and interlock work where switching is occasional and the load is real.

Decoding the order code

SC: Aeco capacitive sensor.

30: M30 x 1.5 barrel diameter.

M: metal housing. The SC30SP and SC30P variants of the same sensing family are plastic-bodied, with different mechanical and chemical resistance.

AE25: adjustable sensing distance, 0 to 25 mm. The A20 variant is the 20 mm version. The C-series equivalents (SC30M-CE25 NPN or PNP) are the DC transistor-output sensors, same body with a different output stage.

NO/NC: changeover contact, programmable as normally open or normally closed.

K: cable version, as opposed to a connector version.

The Aeco stock code for this exact configuration is CAP000023. Also written SC30MAE25NONCK, SC30M-AE25-NO/NC-K, SC30M AE25 NO/NC K and SC30M-AE25 NO/NCK.

Published specifications

Sensor type: capacitive proximity sensor.

Thread and body: M30 x 1.5, metal housing.

Sensing distance: 0 to 25 mm, adjustable.

Output: 1 A, 220 V changeover relay, volt-free NO / NC contact.

Output function: fully programmable, normally open or normally closed, instantaneous or delayed.

Delay modes: TE NO (delay on energisation, NO contact), TE NC (delay on energisation, NC contact), TD NO (delay on de-energisation, NO contact), TD NC (delay on de-energisation, NC contact).

Connection: cable (K version).

Detects: metals, plastics, glass, wood, powders, granulates and liquids.

Optional accessory: SCM-R protection housing in POM, for high abrasion resistance and for sensor substitution in level-control service.

Delay functions

TE NO: contact open with no material present. Material enters the sensing zone, the set delay runs, then the contact closes. Material leaves and the contact opens instantly. This mode ignores brief or intermittent presence such as splashing liquid, tumbling product or a passing gap, and acts only on sustained presence.

TE NC: contact closed with no material. Material enters and the contact opens immediately; material leaves and the delay runs before the contact closes again.

TD NO: contact closes the instant material arrives; when material leaves, the delay runs before the contact opens. This is the hold-on function that keeps a pump or conveyor running briefly after product clears.

TD NC: contact closed with no material; material arrives and the delay runs before the contact opens; material leaves and the contact closes instantly.

The four modes cover functions that would otherwise need a timer relay in the panel.

Quantity and configuration

Sensor only, one piece, with its integral cable.

Sensing behaviour

Capacitive sensors respond to the dielectric constant of the target, so sensing range varies substantially with the material: water and wet product give strong signals, dry plastics and low-density powders much weaker ones.

A capacitive sensor set to the full 25 mm range registers thin tank walls, the mounting bracket, and condensation and product build-up on the face. The adjustable range assumes the sensing face has a reasonably clear view of the target.

Interchange guidance

Search forms include SC30M-AE25 NO/NC K, SC30MAE25NONCK, SC30M-AE25-NO/NC-K, SC30M AE25 NO/NC K, SC30M-AE25 NO/NCK and the Aeco stock code CAP000023. Related sensors in the same Aeco family are not interchangeable: SC30M-A20 NO/NC K is the 20 mm version; SC30M-CE25 NPN and PNP are DC transistor outputs rather than relay; SC30SP-AE25 and SC30P-AE25 are plastic-housed; SC30SM-AE25 is a different body form. Each of those fits an M30 x 1.5 hole and then behaves differently. Aeco is an Italian sensor manufacturer (Inzago, Milan) and this family remains a current catalogue range.