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ProbeHarbor vs SensorPush sensors
SensorPush sensors are compact and accurate: the HT1 is $54.95 and the water-resistant HT.w is $69.99, both rated from −40°F to 140°F with a year or more of battery life. They are Bluetooth sensors, so your phone has to be in range unless you add the $99.95 G1 Wi‑Fi Gateway, which includes cloud access with no monthly fee and in-app and email alerts. ProbeHarbor starts from the other end: an ESP32 with a waterproof probe (about $25 in parts) reports over Wi‑Fi on its own, email and chat alerts are free, and leak contacts, forecast warnings, and Home Assistant are built in. SMS is on Pro.
ProbeHarbor vs SensorPush
| Capability | ProbeHarbor | SensorPush |
|---|---|---|
| Hardware | DIY: ESP32 / Pico / Arduino + DS18B20 or DHT22 | Finished Bluetooth sensor |
| Up-front cost | About $25 in parts per probe | $54.95 (HT1) or $69.99 (HT.w) per sensor |
| Alerts away from home | Yes, sensors report over Wi‑Fi | Needs the G1 Wi‑Fi Gateway ($99.95) |
| Ongoing cost | Free plan; Member $4/mo; Pro $10/mo for SMS | None; gateway cloud has no monthly fee |
| Rated for freezing spaces | Yes (DS18B20 probe: −67°F to 257°F) | Yes (−40°F to 140°F) |
| Alert channels | Email, push, chat apps free; SMS, webhooks on Pro | In-app and email; SMS not listed |
| Power | USB power at the board | Battery: over 1 year (HT1), over 2 years (HT.w) |
| API | HTTP ingest on every plan; API keys on Pro | API for the gateway cloud |
When to choose which
Choose ProbeHarbor when
- You want remote alerts without buying a gateway
- You want a waterproof probe on the pipe, or several probes from one board
- You want SMS, chat-app, or webhook alerts, or a leak contact on the same account
- You run Home Assistant, ESPHome, or MQTT and want readings to flow into it
Choose SensorPush when
- You want a small finished sensor with a year or more of battery life
- You are usually home, so Bluetooth range to your phone is enough
- You want very accurate air temperature and humidity (a humidor, instrument case, or wine storage)
- You prefer a one-time purchase with no plan to think about
Frequently asked questions
Straight answers for people comparing ProbeHarbor to SensorPush.
Does SensorPush work without the gateway?
Yes, over Bluetooth when your phone is in range (SensorPush lists 325 feet line of sight). To see readings or get alerts when you are away, you need the G1 Wi‑Fi Gateway.
Does SensorPush charge a subscription?
No. SensorPush says the cloud service included with the G1 Wi‑Fi Gateway has no monthly fee.
Which costs less for remote freeze alerts?
For one sensor with remote alerts, SensorPush is $154.90 (HT1 plus gateway) once. A ProbeHarbor probe is about $25 in parts with free email alerts, or $100 a year more if you want SMS on Pro. Extra SensorPush sensors add $54.95 each; extra ProbeHarbor probes add about $25, or less if they share a board.
Is SensorPush more accurate?
For air temperature, yes: SensorPush lists ±0.5°F typical for the HT1 against about ±1°F for a DS18B20. For a freeze alarm either is ample, since the alert threshold should sit a few degrees above 32°F anyway.
Sources
SensorPush details come from their own pages, checked October 2026. Prices change; check before you buy.
Related answers
Next steps
Start free with live charts, email alerts, and a family live share link, or compare plans when you need SMS, CSV history, and expanded Pro share scopes.