Process engineers, plant operators, EPC designers, and maintenance teams need reliable point-level or object detection in harsh, dusty, corrosive, or high-temperature environments. For them, the Microwave 320 provides non-contact microwave sensing that detects liquid or solid presence without touching the process media.
Unlike capacitive, ultrasonic, or photoelectric switches — and unlike Sonac 110/220 contact-type switches — the Microwave 320 is immune to dust, vapor, coating, vibration, and buildup and can be mounted externally through a sightglass or non-metallic wall. It’s ideal for abrasive materials, corrosive chemicals, high-temperature ducts, and plugged-chute detection where contact-based devices fail.
Choose the Microwave 320 when contact is impossible or undesirable, extreme environments exist, or long-term reliability without maintenance is critical.
Senses material presence without contacting product — no buildup, wear, or corrosion.
Enables external installation on pressurized or corrosive vessels without penetrations.
Maintains reliable switching in cement, grain, mining, and chemical vapor environments.
Optional water-cooled MT/MR sensor heads support extreme heat applications.
Rejects electrical & microwave interference — avoids false trips.
Prevents nuisance chatter in turbulent or intermittent flows.
Glass-reinforced polyester housing for chemical and outdoor duty.
Zero mechanical wear — maintenance-free operation.
The Microwave 320 is engineered for environments where traditional level switches fail:
A directional microwave beam detects material movement or presence — whether inside a vessel, through a process window, or across a chute — ensuring accurate high/low alarms, blockage alerts, and feed control. With no wetted parts, it performs reliably even where product buildup, abrasion, or corrosion would destroy conventional switches.
| Parameter | Value |
|---|---|
|
Technology |
Non-contact microwave (X-band 10.525 GHz) |
|
Media |
Liquids, solids, slurries — presence/absence |
|
Output |
SPDT relay |
|
Action |
ON/OFF switching |
|
Range
|
Several-foot air gap (application dependent) |
|
Beam Angle |
~40° |
|
Power |
120 VAC / 240 VAC / 24 VDC |
|
Housing |
Glass-reinforced polyester, sealed industrial |
|
Temperature |
High-temp option with water-cooled MT/MR assemblies |
|
Environment Resilience |
Immune to dust, fog, vapor, vibration |
|
Adjustments |
Independent ON & OFF time delay |
|
Approvals |
FM Approved (with MT 851 / MR 851 heads) |
|
Mounting |
External through sightglass or wall; bracket mounting |
Have a look at the flyer to get all the tech specs and product features.
Brochure
Read the manual for detailed information and instructions.
Manual
Check out a sample cert from our calibration lab.
Certificate
If you have a question that we have not covered then just get in touch and we’ll be happy to help.
We have tried to answer the most common questions we are asked here.
Microwave sensing is unaffected by buildup, dust, fog, and vibration — making it far more reliable in rugged industrial environments.
Yes — it excels in solids applications like grains, powders, pellets, cement, and mining materials.
No. It provides true non-contact detection, ideal for corrosive, abrasive, or sanitary processes.
Yes — microwave waves transmit through non-metallic walls or sightglass, eliminating process penetration.
For extreme heat applications (500°F or higher), the Microwave 320 offers optional water-cooled sensor assemblies. This accessory isolates the electronics from the process heat, ensuring the sensitive components remain within their operating temperature range for safe, stable, and long-term performance.