eMotion Air vs Pro vs Ultra: Home Assistant Presence Sensor Buying Guide
Choosing a Home Assistant presence sensor is not only a radar-spec decision. The right device depends on where the sensor will be placed, whether the room needs local IR control, whether battery placement matters, and how much room context you want inside Home Assistant or the LinknLink App.
This guide compares eMotion Air, eMotion Pro, and eMotion Ultra so you can map each room to the right LinknLink sensor and avoid buying the wrong device for the job.
Quick Recommendation: Choose by Room Problem
Choose eMotion Air
Use it when battery placement, renter-friendly mounting, hallway coverage, or flexible sensor position matters more than built-in appliance control.
Choose eMotion Pro
Use it when a room needs presence sensing plus local IR control for AC, TV, fan, or lighting scenes through Home Assistant.
Choose eMotion Ultra
Use it when you want 60GHz sensing, higher precision room context, a temperature and humidity sensor cable, and built-in IR in one device.
If the room is hard to wire, start with eMotion Air. If the room has an appliance you want to control, start with eMotion Pro. If the room is high-value, climate-sensitive, or needs richer automation context, start with eMotion Ultra.
Main Comparison Table
| Decision point | eMotion Air | eMotion Pro | eMotion Ultra |
|---|---|---|---|
| Best role | Battery-powered flexible presence sensor | Presence sensor with built-in IR room control | Higher precision 60GHz room intelligence sensor |
| Best rooms | Hallway, bedroom, rental room, pet zone, entry area | Living room, AC room, TV room, office, bedroom | Living room, climate-sensitive room, high-value automation zone, workshop |
| Power / placement | Flexible battery placement | Fixed powered placement for stable room control | Fixed powered placement for richer context |
| Radar positioning | mmWave presence detection for flexible room coverage | mmWave presence detection plus appliance action | 60GHz mmWave for higher precision sensing |
| Built-in IR | No dedicated IR role; pair with eRemote HA if needed | Built-in IR for AC/TV/fan scenes | Built-in IR for advanced room scenes |
| Temperature / humidity context | Use external Home Assistant sensors when needed | Use external Home Assistant sensors when needed | Temperature and humidity sensor cable |
| Best buying reason | You need presence detection where wiring is inconvenient. | You want presence to trigger local IR appliance control. | You want 60GHz presence, climate context, and IR in one stronger room node. |
When to Choose eMotion Air
Choose eMotion Air when the sensor location is more important than the nearby power outlet. Many Home Assistant presence projects fail because the ideal detection point is not where the cable can go. eMotion Air is useful for hallways, bedside placement, pet care areas, temporary rentals, and small apartments where clean installation matters.
eMotion Air is also a good first sensor when you are still testing where presence detection should live. Use it to learn the room behavior, then decide whether that room also needs a powered IR-capable sensor later.
- Use it for rooms where you need flexible battery placement.
- Use it for areas where users pass through quickly but still need reliable occupancy context.
- Pair it with eRemote HA when the room also needs local IR control.
- Use it alongside the Battery Powered Presence Sensor Guide for placement planning.
When to Choose eMotion Pro
Choose eMotion Pro when the room decision should immediately control an appliance. The most common example is an AC, fan, TV, or projector routine where presence changes the device state. Instead of using one presence sensor and a separate IR blaster, eMotion Pro can combine room context and built-in IR in the same automation path.
This is especially useful for Home Assistant users who want fewer devices on the wall and a clearer connection between occupancy and action. A living room scene might use eMotion Pro to detect occupancy, keep the TV or AC state consistent, and still allow local automation logic through Home Assistant.
- Use it for rooms where presence and IR should be linked.
- Use it for AC, fan, TV, projector, or room comfort scenes.
- Use it when you want fewer device nodes than a sensor-plus-separate-IR setup.
- Pair it with the Home Assistant Remote Control Guide for IR/RF planning.
When to Choose eMotion Ultra
Choose eMotion Ultra for the room where richer context matters. In addition to 60GHz mmWave presence sensing, eMotion Ultra includes a temperature and humidity sensor data cable and built-in IR. That means the room can understand more than “someone is here.” It can also use climate context and appliance control in the same local automation story.
This is useful for living rooms, home offices, workshops, bedrooms, and climate-sensitive rooms where a simple motion rule is not enough. For example, a Home Assistant automation can decide whether to hold an AC scene, adjust a fan, keep a quiet focus scene active, or avoid turning off the room too quickly.
- Use it where 60GHz radar precision is more valuable than flexible placement.
- Use it when temperature and humidity context should influence automation decisions.
- Use built-in IR when the sensor should also trigger AC, fan, or TV control.
- Use the 60GHz mmWave Sensor Placement Guide before final mounting.
Home Assistant Setup Path
A reliable Home Assistant setup starts with simple helpers and a clear naming structure. Do not make the first automation too clever. First confirm that presence behavior is stable, then add device control, dashboards, and conditional logic.
Name the room problem
Decide whether the room needs flexible placement, appliance control, or higher precision context. This tells you whether the starting sensor should be Air, Pro, or Ultra.
Create stable helpers
Use helpers such as living_room_presence_mode, bedroom_comfort_mode, office_focus_mode, and manual_override. Clear helpers make automations easier to debug.
Test detection before action
Log presence changes for a few days before letting the sensor control AC, TV, fan, or lighting scenes.
Add local control
Use eMotion Pro, eMotion Ultra, or eRemote HA when the room needs IR actions. Use eHome HA when the target is a compatible RF device.
Expose the room in the LinknLink App
Use the LinknLink App and Home Assistant dashboards to make the automation visible to family members, not hidden in backend rules.
Air, Pro and Ultra by Use Case
| Use case | Best first choice | Why | Useful companion |
|---|---|---|---|
| Rental bedroom | eMotion Air | Flexible battery placement with less installation friction. | HomeClaw or Home Assistant dashboard |
| Living room AC and TV scene | eMotion Pro | Presence plus built-in IR makes room action direct and understandable. | LinknLink App room dashboard |
| Climate-sensitive home office | eMotion Ultra | 60GHz sensing plus temperature/humidity cable gives richer automation context. | HomeClaw and iSG Display Max |
| Hallway or entry zone | eMotion Air | Placement flexibility is usually more important than appliance control. | eDS2 door sensor where door state matters |
| Workshop or utility room | eMotion Ultra | Precision, climate context, and IR can support safer comfort and task scenes. | eRemote HA or eHome HA if needed |
| Pet care comfort room | eMotion Air or eMotion Ultra | Air helps placement around pet zones; Ultra helps climate-aware room decisions. | HomeClaw pet care helper |
Pairing Sensors with LinknLink App, HomeClaw and Remotes
A sensor decision should not stop at the product page. The best SEO and automation path connects the sensor to the rest of the local smart home stack. Use HomeClaw as the private Home Assistant and AI gateway layer, use iSG Display Max when a wall display or room control surface is useful, and use eRemote HA or eHome HA when a room needs dedicated IR/RF command paths.
The LinknLink App Room Dashboard Guide shows how to make these choices visible inside room cards, so a family member can understand what the automation is doing without reading YAML.
Common Buying Mistakes
| Mistake | Why it happens | Better choice |
|---|---|---|
| Buying a powered sensor when the best position has no outlet | The room plan starts with the device spec instead of the detection angle. | Start with eMotion Air or test placement before committing. |
| Using a sensor only for lights when the room actually needs appliance control | The automation ignores AC, fan, TV, or purifier behavior. | Use eMotion Pro or eMotion Ultra where built-in IR matters. |
| Ignoring climate context in a room that changes temperature quickly | Presence alone cannot explain comfort or humidity behavior. | Use eMotion Ultra with its temperature and humidity sensor data cable. |
| Creating hidden automations with no dashboard | Family members cannot tell why a room changed state. | Add LinknLink App room cards or an iSG Display Max control surface. |
| Using one article or one product page to cover every decision | Different queries need different landing pages. | Use this buying guide for comparison, product pages for purchase intent, and troubleshooting guides for post-purchase intent. |
Related Products and Guides
Use the links below to move from comparison to the exact product or setup path.
Hot products
- eMotion Air battery-powered mmWave presence sensor
- eMotion Pro mmWave presence sensor with built-in IR
- eMotion Ultra 60GHz mmWave presence sensor with temperature/humidity data cable and IR
- HomeClaw private AI gateway for Home Assistant
- iSG Display Max smart home hub and room control surface
- eRemote HA IR remote hub for Home Assistant MQTT
- eHome HA RF smart hub for Home Assistant MQTT
Related guides
- Best mmWave presence sensors for Home Assistant
- PIR vs mmWave motion sensor guide for Home Assistant
- 60GHz mmWave sensor placement guide
- Battery powered presence sensor guide
- Presence sensor troubleshooting guide
- Home Assistant remote control guide for IR, RF and MQTT
- LinknLink App room dashboard automation guide
FAQ
Which eMotion sensor should I buy first for Home Assistant?
Choose eMotion Air if flexible battery placement matters, eMotion Pro if the room needs presence plus built-in IR control, and eMotion Ultra if you want 60GHz sensing with temperature, humidity, and IR context.
Does eMotion Ultra only add 60GHz radar?
No. eMotion Ultra also includes a temperature and humidity sensor data cable and built-in IR, so it can support richer climate-aware and appliance-aware room automation.
Can eMotion Pro control AC or TV devices?
Yes. eMotion Pro is useful when presence should trigger local IR-controlled appliances such as AC, fan, TV, or projector scenes through Home Assistant logic.
When should I use eRemote HA with these sensors?
Use eRemote HA when a room already has a presence sensor but needs a dedicated local IR command path for AC, TV, fan, or similar IR appliances.
How does the LinknLink App fit into a Home Assistant setup?
The LinknLink App can turn sensor context into room dashboards, natural-language Agent+ scenes, and family-friendly controls while Home Assistant keeps the underlying automation logic local.
Build the Right Presence Sensor Stack
Start with the room problem, then choose the sensor. Use Air for flexible placement, Pro for presence plus IR, and Ultra for 60GHz precision with climate context and built-in IR.