AUTOMATIZA_LAB
See ranking
#29 in Industrial Control (B2B)
Tzone Modbus RTU RS485 Temperature & Humidity Sensor
Industrial Control (B2B)

Tzone Modbus RTU RS485 Temperature & Humidity Sensor

5.0(9 reviews)

$43.99reference price

View on Amazon

Best for

Anyone who wants to add a second type of Modbus data (ambient temperature and humidity) to a Node-RED project, in addition to or instead of a pressure sensor — useful for greenhouses, grow rooms, or control rooms.

  • RS485
  • Modbus RTU
  • IP54

What is it and what's it for?

It's an industrial temperature and humidity sensor with RS485/Modbus RTU output — it reads with the same protocol and the same Node-RED nodes (Modbus-Read) as a pressure sensor, so it works to practice with or expand an environmental monitoring project without switching protocols.

Real-world use cases

At home

In a home grow room or greenhouse, you mount it on the wall and read air temperature and humidity over Modbus, alongside any other RS485 sensor you already have on the same bus.

In a business or workshop

A server room, warehouse, or commercial greenhouse uses it to centrally monitor environmental conditions, integrated into the same SCADA system or Node-RED flow that already reads other Modbus equipment.

How to avoid buying the wrong one

  • Uses the industrial SHT30 chip (not an unspecified generic sensor) — with a stated accuracy of ±0.3°C and ±2%RH, and a range of -40°C to 125°C.
  • It only has 9 reviews on Amazon so far — it's a real brand with its own store (sold and shipped by Amazon), but without the track record of other products in this catalog.
  • Lets you address multiple sensors on the same RS485 bus with a DIP switch — useful if you plan to add more than one of these sensors later.

The investment takeaway

At $43.99 it costs more than a generic DHT sensor for Arduino, but the difference is real: an industrial Modbus RTU protocol (not a homemade library), an IP54 housing for outdoor/greenhouse use, and an LCD screen to read the value without needing a connected computer. It makes sense if your project already uses RS485/Modbus for something else (like this catalog's USB-RS485 converter) and you want to add the same protocol, not a new one.

Tzone Modbus RTU RS485 Temperature & Humidity Sensor

$43.99reference price

See current price on Amazon

More products in this category

#1Waveshare RS232/485/422 to Ethernet Gateway (PoE)

Waveshare RS232/485/422 to Ethernet Gateway (PoE)

RS485/ModbusPoEDIN rail
4.2 · 120 reviews

Supports all three serial standards (RS232/485/422) on one device, so it works for both old instruments with an RS232 port and multi-device RS485 buses. PoE power is a real plus in installations where there's no outlet near the panel — a single Ethernet cable carries both data and power. Confirm whether your Modbus master needs TCP Server or Client mode before buying; the mode is set in software, it doesn't come fixed from the factory.

$36.99reference price

See current price on AmazonSee full buying guide
#2MOLLOM VFD 1.5kW (2HP) — Single-Phase to Three-Phase 220V

MOLLOM VFD 1.5kW (2HP) — Single-Phase to Three-Phase 220V

220V 1P→3P2HPCNC
4.1 · 31 reviews

Single-phase input to 220V three-phase output — the typical choice for workshops without a three-phase feed that want to run a 3-phase motor. This is an entry-level model (2HP/1.5kW), meant for spindles and small CNC motors, not large industrial loads. The output range up to 3000Hz is only useful if your specific spindle takes advantage of it — for a standard 60Hz motor it's irrelevant.

$89.99reference price

Check it out on AmazonSee full buying guide
#3VFD 4kW (5HP) Vector Control — 220V 1-Phase/3-Phase

VFD 4kW (5HP) Vector Control — 220V 1-Phase/3-Phase

Vector control5HP1P/3P
4.3 · 24 reviews

Has vector control (not just scalar V/F), which holds torque better at low RPM — important if you'll be threading or cutting at reduced speed. At 5HP/4kW it covers larger motors than the entry-level model, and accepts both single-phase and three-phase input, giving flexibility depending on the electrical setup available. Rated up to 26A — confirm your wiring and breakers can handle that current before installing.

$174.99reference price

Check availability on AmazonSee full buying guide
See the full ranking of Industrial Control (B2B) →