Owning property is mostly quiet. Then it isn’t. A furnace quits in a house that’s between tenants. A vacation home sits empty through a February cold snap. A basement takes on water in a rental two states away. None of these start as emergencies — they become emergencies because nobody was there to notice them early.

Watchman is a WiFi-based smart sensor and data logger built for that exact problem. It watches temperature, humidity, pressure, water, gas and noise inside your property and alerts you when a reading leaves the range you’ve set, so the first you hear about a problem is an alert on your phone rather than a repair bill.

Multiple properties, vacant properties, rentals and vacation homes

The more properties you own, the thinner your attention gets spread — and the properties that need watching most are usually the ones you visit least.

• Multiple properties. You can’t be in several places at once, and the one you aren’t thinking about is usually the one with the problem.
• Vacant properties. Between tenants, mid-renovation, or on the market, there is no one inside to notice a cold room, a damp smell, or a running leak.
• Rentals. Tenants report problems late, if at all — often only once the problem is inconvenient to them, which is well past the point it was cheap to fix.
• Vacation homes. Empty for most of the year, frequently in climates that punish an unheated building, and usually far enough away that checking in means a whole trip.

Even a managed property isn’t monitored 24/7

This is the gap most owners don’t think about until it costs them. A property manager is a genuinely good thing to have — but even when your properties are managed, they are not monitored around the clock. Management means periodic visits, tenant coordination, and response when something is reported. It does not mean someone is standing in your empty vacation home at 2am on a Sunday in January.

So the question isn’t whether your manager is doing their job. It’s how many hours pass between a problem starting and a human being noticing it. Watchman closes that window from days to minutes, and it does so without anyone having to be there.

One dashboard for everything you own

Every Watchman unit you install reports into the same place: the pp-Code web portal and the Watchman.Online app for iOS and Android. One account, all your properties, one screen.

From there you can see current readings at each location, look back through the history, and configure alerts the way you want them. Watchman logs hourly by default, and every 15 minutes on a subscription. A sudden temperature swing of more than 5°F triggers an immediate log and alert no matter what interval you’re on — so a fast-developing problem doesn’t sit and wait for the next scheduled reading.

Email alerts to your own address are included at no cost. A subscription adds text alerts to a US or Canada number, alerts to additional email addresses, a daily snapshot email of your logs, and the Watchman Health Check, which tells you if a site has lost power or internet — because a sensor going silent should never be mistaken for good news.

Deployment: one unit per floor, placed sensibly

Setup is deliberately simple, and you don’t need an electrician or an installer.

1. Plan on one Watchman unit per floor. That’s the recommendation for most homes and buildings. A single unit can’t represent conditions on a floor it isn’t on — basements in particular behave very differently from the rest of the house.
2. Hang it on a wall, or set it on a piece of furniture. Either works. What matters is that it’s in the open, in a spot representative of the space around it.
3. Pick a spot with good WiFi signal. Watchman connects to your existing 2.4GHz WiFi with no gateway needed. It works up to about 75ft from the access point, and within 50ft for a consistently stable connection.
4. Make sure air circulates normally around it. Don’t tuck it in a closed cabinet, bury it behind boxes, or sit it directly over a heat register or in direct sun. Stagnant or artificially warmed air gives you a reading about that pocket of air, not about the room.

If a property has no usable WiFi, an optional plug-and-play gateway is available, and there’s a 4G LTE option for locations with no internet service at all.

Add your property manager to the alerts

With a subscription, you can include additional users — such as your property manager — on alert notifications. This is usually the right setup for a managed property: you get told, and so does the person who is actually nearby and able to act on it.

It removes an awkward middle step. Rather than you receiving an alert at midnight, deciding whether it’s serious, then trying to reach your manager, you both get the same information at the same moment. You keep full visibility and ownership of the account; your manager gets the operational heads-up they need to respond. A subscription also lets you grant portal access to additional users per unit, if you want someone to be able to look at readings directly rather than just receive alerts.

Buy vs. Lease: for owners, buy

Both options exist. For a property owner, the recommended approach is Buy.

The reasoning is simple: when you buy, the unit stays with your property. It’s yours, it’s part of the building, and there’s no ongoing commitment tied to it. That fits how owners think about their properties — as long-term assets they improve and keep — in a way that leasing hardware doesn’t. Leasing is generally a better fit for management companies rotating equipment across a changing portfolio.

Buying also leaves the choice of features entirely in your hands. You can pay for all the advanced features, or simply be content with the standard ones that come with the product.

Units start at $42.95. The subscription is optional and costs $2.49 per month or $19.99 per year per Watchman, with a one-time lifetime BuyOut available at $49.99 if you’d rather never think about it again. Standard monitoring and email alerts require no subscription at all. Every unit comes with a 30-day money-back guarantee, a 1-year warranty for subscribed customers and 90 days otherwise.

Where owners put them first

• Vacant units and properties on the market
• Vacation homes during the off-season
• Basements and crawlspaces, paired with a water sensor
• Utility and mechanical rooms
• Sheds, barns and detached garages
• Wine cellars and humidity-sensitive storage
• Freezers and cold rooms