942-M88

What is this ultrasonic sensor used for?

It is used for non-contact distance and presence detection by emitting ultrasonic pulses and measuring the echo return time. Typical uses include monitoring fill levels, detecting objects on conveyors, and checking position where optical sensors may struggle with dust, colour, or surface finish.

Is this a complete sensor or part of a two-piece system?

It is a sensor head intended to be used with a separate amplifier/controller from the same 942 Series system. The amplifier provides the selectable switching, analogue, and multiplexed digital outputs; the sensor head performs the ultrasonic transmit/receive function.

What sensing range can I expect in normal use?

For the 942 Series configuration associated with this sensor head, the typical usable range is approximately 150 mm to 1500 mm (about 5.9 in to 59.1 in), depending on target size, angle, and surface characteristics.

Does it work with different target materials?

Yes. Ultrasonic sensing can detect a wide variety of materials (including many metals, plastics, wood, and liquids). Performance depends on how well the surface reflects sound back to the sensor; soft, angled, or highly irregular surfaces may reduce effective range.

What beam angle does it use, and why does that matter?

The 942 Series is typically specified with approximately a 10° beam, with an option to narrow the effective beam to around 5° by reducing sensitivity (set at the amplifier). A wider beam can help with detection robustness, while a narrower beam can reduce unwanted echoes from nearby structures.

What supply voltage does the system require?

The associated 942 Series system is designed for a 19–30 VDC supply (provided to the amplifier, which then interfaces to the sensor head). Always confirm the exact supply and wiring at the amplifier terminals used in your installation.

What output types are available from the system?

With the matching 942 Series amplifier, you can typically obtain two PNP switching outputs plus analogue outputs (0–10 V and 4–20 mA) and multiplexed digital outputs (BCD/hexadecimal). The sensor head itself does not directly provide these output formats; they are generated by the amplifier.

How are switching points or distance scaling set?

In the 942 Series system, setpoints and analogue range/slope are typically configured at the amplifier using built-in switches. This allows you to define trip points for switching outputs and adjust the analogue output behaviour to suit your measurement range.

Can multiple ultrasonic sensors be used close together without interference?

Yes, when used with the correct 942 Series amplifier features. The system supports a hold/synchronisation approach to reduce mutual interference by coordinating when each sensor transmits and listens for echoes.

What environmental sealing can I expect?

In the typical 942 Series arrangement, the sensor head is sealed to IP65, while the amplifier enclosure is typically IP54. This makes the sensor head suitable for industrial environments where splashing water and dust are present, provided installation practices maintain the seal integrity.

What operating temperatures are typical for this sensor head and system?

For the 942 Series system associated with this sensor head, the sensor head is typically rated for operation from 0 to 70 °C, while the amplifier is typically rated from 0 to 50 °C. Storage temperatures are typically wider than operating temperatures.

Are there known replacement options if this sensor head is being updated?

Yes. In the 942 Series cross-reference, the 942-M88 sensor head is commonly replaced by 942-M96. If you are matching an existing installation, confirm mechanical fit, connector style, and compatibility with the amplifier in use.