Monitor Temperature via LAN
Plug it into your network and monitor temperature locally from any web browser, Home Assistant, PRTG, or Zabbix. No internet required. No cloud, no subscription.
From 55 € per sensor, paid once.
- 2000+ units soldRated 5.0 out of 5 in our shop
- Designed and built in the EUShipped from Lithuania
- Worldwide shippingEU delivery in 3–7 business days
- 12-month warranty30-day returns
Choose your sensor
Need humidity as well? Take the IP Temp & Humidity Sensor. Need a waterproof probe, a cable up to 5 m or readings below −40 °C? Take the IP Thermometer Basic.
IP Thermometer Basic
from55 €
Temperature on a waterproof stainless-steel probe. Ideal for freezers, cold rooms, heating systems and outdoor air.
- Measures
- Temperature
- Range
- −55 to +125 °C
- Accuracy
- ±0.5 °C from −10 to +85 °C, 0.1 °C resolution
- Probe
- DS18B20, waterproof
- Probe cable
- 1 m (55 €), 3 m (60 €) or 5 m (65 €)
- Power
- USB 5 V, or PoE through our splitter
- In the box
- Sensor with probe, 1 m USB cable. Power it from a 5 V, 1 A USB charger.
Temperature and relative humidity from one SHT30 probe. Ideal for server rooms, warehouses, greenhouses and offices.
- Measures
- Temperature and humidity
- Range
- −40 to +125 °C, 0 to 100 % RH
- Accuracy
- ±0.3 °C from 0 to 65 °C, ±3 % RH from 10 to 90 %
- Probe
- SHT30
- Probe cable
- 1 m
- Power
- USB 5 V, or PoE through our splitter
- In the box
- Sensor with probe, 1 m USB cable. Power it from a 5 V, 1 A USB charger.
Accessories
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PoE Splitter15 €
Powers a sensor from a PoE switch or injector, so one Ethernet cable carries data and power. 802.3af in, 5 V USB-C out.
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Cat5e Ethernet cablefrom 4 €
Grey U/UTP patch cable in 1, 3 or 5 m.
Covers the temperatures you care about
Typical ranges for common setups, against what each sensor can measure. Both sensors are at their most accurate where most setups sit. Select a setup to line it up against the sensors.
- Typical range of the setup
- Sensor measuring range
- Sensor’s best accuracy
- Freezer−25 to −15 °C
- Medical fridge2 to 8 °C
- Wine cellar humidity10 to 14 °C
- Warehouse humidity15 to 25 °C
- Living spaces18 to 24 °C
- Server room humidity18 to 27 °C
- Greenhouse humidity15 to 30 °C
- Heating and hot water40 to 80 °C
- IP Thermometer Basic−55 to +125 °C±0.5 °C from −10 to +85 °C
- IP Temp & Humidity Sensor−40 to +125 °C±0.3 °C from 0 to 65 °C
Set up in under five minutes
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Plug it in
Connect the sensor to a free port on your router or switch, and power it from a 5 V USB charger or from a PoE switch through our splitter. It picks up an IP address automatically.
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Open its address
Type the address into any browser on your network. To find it, check your router’s list of devices or run the free IP Thermometer Finder.
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Monitor and get alerts
Watch the live reading with its minimum and maximum, add the sensor to Home Assistant, PRTG or Zabbix, or have IFTTT alert you when a limit is crossed.
Read it from anything on your network
Each sensor runs its own small web server. Open it in a browser, or let your software ask it for the latest reading.
- Web interface
- The live reading with its minimum and maximum, on any phone, tablet or PC. Settings are password-protected.
- Plain-text endpoints
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/treturns the temperature and/hthe humidity as plain text, ready for scripts and Zabbix HTTP agent items. - JSON endpoint
-
/prtgreturns JSON that PRTG Network Monitor reads directly and any script can parse. - Push and alerts
- Send readings to your own server at a set interval, or call IFTTT when a limit is crossed and get an email, SMS or app notification. IFTTT webhooks need a paid IFTTT plan.
Works with Home Assistant, PRTG, Zabbix, IFTTT and your own scripts.
Terminal
$ curl http://192.168.1.47/t
21.4Home Assistant, configuration.yaml
sensor:
- platform: rest
name: Server room
resource: http://192.168.1.47/t
unit_of_measurement: "°C"
device_class: temperature
state_class: measurementTry a real sensor before you buy
Two demo sensors are online for you to try. Open their web interface, or call the endpoints from your own scripts.
IP Thermometer Basic
Settings password for the demo: 1234
IP Temp & Humidity Sensor
No cloud, no account, no monthly fee
Many smart sensors depend on their maker’s cloud. Ours answer only to your network.
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Keeps working offline
The sensor serves its own web page, so your readings stay available when the internet connection doesn’t.
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Your data stays yours
Nothing is sent to us or to third parties, unless you set up forwarding yourself.
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Pay once
No subscription and no account to create. Buy the sensor and it is yours, with no running costs.
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Proven firmware
Stable firmware, running in thousands of installations and built for continuous operation.
What customers say
“easy and simple solution. works perfectly. my dakboard dashboard is now showing the values from the ipthermometer json output.”
“Das IP-Thermometer ist perfekt für die Integration in eigene
Software-Lösungen.”
“The IP thermometer is perfect for integrating into your own software.”
“Great product, works straight out of the box.”
“Ich habe insgesamt 3 Stück von den IP TH’s im Einsatz. … Klare
Kaufempfehlung.”
“I have three IP TH sensors running. … A clear recommendation.”
Common questions
More in the full FAQ, or ask us directly. We usually reply within 24 hours on business days.
Do I need internet, an app or an account?
No. The sensor has a built-in web server, so any browser on your network can open it. There is nothing to install, and it keeps working when your internet connection is down.
How do I find the sensor’s IP address?
The sensor gets its address from your router (DHCP). Look it up in your router’s list of connected devices, or use the free IP Thermometer Finder for Windows, macOS, Linux or Android. You can also set a static IP.
Can it run on Power over Ethernet?
The sensors are powered over USB (5 V) and have no PoE built in. With our PoE Splitter, one Ethernet cable from an 802.3af PoE switch or injector carries both data and power.
Can it send email or SMS alerts?
The sensor does not send email itself. It can call an IFTTT webhook when the temperature crosses your limit, and IFTTT then sends the email, SMS or app notification. IFTTT webhooks need a paid IFTTT plan.
If you use Home Assistant, PRTG or Zabbix, you can set up alerts there instead.
Does it support MQTT or SNMP?
Not on the current models, which use HTTP with plain-text and JSON endpoints. MQTT and SNMP are planned for IP Thermometer PRO, which is in development. Read the development update.
Can I use several sensors on one network?
Yes, as many as you need. Each sensor has its own IP address and works independently.
Can I measure outdoors?
Yes, with the IP Thermometer Basic: its waterproof probe can go outside, while the sensor unit itself stays in a dry, protected place.
How fast is delivery, and what does it cost?
Orders ship from Lithuania within 1–2 business days. Delivery takes 3–7 business days in the EU and 1–3 weeks elsewhere. Shipping is a flat rate to any country, shown at checkout. Outside the EU, import duties and taxes are paid by the buyer.
Do you offer volume pricing or custom versions?
Yes. We quote bulk orders and build custom hardware, firmware and OEM versions. Tell us what you need.
Start with one sensor. Add more any time.
Every sensor works on its own, so you can begin with one room and grow from there. Planning a larger rollout? Ask us for volume pricing.
- 12-month warranty
- 30-day returns on unused items
- Invoice with every order
- Pay by card, PayPal, Apple Pay or Google Pay