HTemp-485 Box2
€154.40
The RS-485 Combination Sensor for Temperature and Humidity
The HW group HTemp-485 Box2 is a digital RS-485 sensor for temperature and relative humidity in a wall-mount housing. The sensor has minimal power consumption and can be operated over a wide voltage range. It can be operated independently via the RS-485 bus or connected to Poseidon 2250 or Poseidon2 4002.
Measured temperature and humidity values are already transmitted in °C or % humidity via a simple text protocol. Up to 32 sensors can be connected over a distance of up to 1000 m via a 4-wire bus that includes both the RS-485 line and the power supply.
The RS-485 protocol is compatible with the Temp-485 sensor from HW group. Since temperature and humidity are read out as two independent measurements, each with its own address, every HTemp device has two different RS-485 communication addresses: an uppercase letter stands for the temperature address, a lowercase letter for the humidity address.
Temperature and Humidity in One Device
The HTemp-485 Box2 delivers both measured variables precisely and independently addressable.
Temperature Measurement -10 to +70 °C
Measuring accuracy of ±0.8 °C over the entire measuring range.
Humidity Measurement 0-100 %
Accuracy of 5 % relative humidity in the range 0–90 % RH at 20–40 °C.
Two Separate RS-485 Addresses
Temperature and humidity are transmitted as two independent measurements, each with its own address.
Bus Range up to 1000 m
Up to 32 sensors can be connected via a common 4-wire RS-485 bus.
Minimal Power Consumption
No voltage regulation required; operation over a wide supply voltage range is possible.
How the HTemp-485 Box2 Is Built
Inside the wall-mountable housing is a compact board with all connection and configuration elements.
External, Gold-Plated Temperature Sensor
The actual temperature measuring element is located directly on the board and is gold-plated.
RJ45 and Terminal Connection
The RS-485 bus and power supply are connected either via an RJ45 connector or via a terminal board.
Jumpers for the Address
The RS-485 address of the sensor can be set via jumpers on the board; alternatively, addressing is also possible via the Terminal SETUP mode.
DIP Switch for Bus Termination
A DIP switch activates the termination of the RS-485 bus at the sensor if required.
LED Indicators
A green LED signals “Power OK”, a yellow LED indicates ongoing communication via the RS-485 bus.
Wall-Mountable Housing
The housing is fastened to the wall with two screws and can therefore be installed easily.
Simple Text Protocol for Larger Sensor Networks
The HTemp-485 Box2 can be combined with additional sensors to form a larger measuring network.
- Transmission of values already in °C or % humidity via a simple text protocol
- Up to 32 sensors via a common 4-wire bus (RS-485 line plus power supply)
- Bus range up to 1000 m
- Protocol-compatible with the Temp-485 sensor from HW group
- Addressing via jumpers or in Terminal SETUP mode
- RS-485 termination can be activated via DIP switch; the bus line is always terminated with 10 kΩ in the idle state
Standalone or with Poseidon Devices
The HTemp-485 Box2 can be read out independently via RS-485 or integrated into a Poseidon monitoring system.
- Compatible with Poseidon 2250 and Poseidon2 4002
- A Poseidon2 4002 can supply up to 4 of these sensors directly with power
- Measurement data can be retrieved via SNMP, WEB or XML in conjunction with Poseidon devices
- Up to 100,000 measured values can be stored in the internal flash memory of a Poseidon device
- Accessory Poseidon B-Cable converts between 4-wire terminal connection and RJ45
- Accessory Poseidon S-Hub enables the connection of multiple RS-485 sensors to Poseidon devices
Straightforward Wall Mounting
- Fasten the housing at the desired measuring location to the wall with two screws
- Connect the sensor via RJ45 or terminal connection to the RS-485 bus or to Poseidon 2250 / Poseidon2 4002
- Set the RS-485 address via jumpers or in Terminal SETUP mode – separately for temperature and humidity address
- If required, activate bus termination via the DIP switch if the sensor is the last device on the bus
- Use the LED indicators to check power supply and RS-485 communication
Keep Long-Term Accuracy in View
As with all sensors, measuring accuracy can change over time. The manufacturer provides a dedicated application note on sensor accuracy over time and offers the HTemp-485 Box2 with a calibration protocol on request.
Why the HTemp-485 Box2 Is Suitable
Two Measured Variables, One Box
Temperature and humidity in a compact wall housing.
Large Bus Range
Up to 32 sensors via an RS-485 bus with a length of up to 1000 m.
Flexible Addressing
Setting via jumpers or conveniently in Terminal SETUP mode.
Energy-Efficient
Minimal power consumption, no additional voltage regulation required.
Poseidon Integration
Remote monitoring via Ethernet, SNMP, WEB or XML in conjunction with Poseidon devices.
Simple Mounting
Wall mounting with only two screws.
Areas of Application
- Industrial measuring and control systems with many measuring points
- Temperature measurement in storage, industrial or residential rooms
- HVAC and environmental monitoring in smart buildings
- Independent monitoring of food and harvest storage facilities
- Food production and processing
- Temperature and humidity monitoring of medical materials and pharmaceutical warehouses
- Environmental monitoring in residential areas
- Industrial monitoring and control
- Measurement in technological rooms with data transmission via Ethernet (when connected to Poseidon)
The HW group HTemp-485 Box2 combines precise temperature and humidity measurement with a robust, long-range RS-485 connection – a practical solution for environmental monitoring in industry, storage and smart buildings, either standalone or together with a Poseidon system.
Frequently Asked Questions
What is the HTemp-485 Box2 and what is it used for?
The HTemp-485 Box2 is an RS-485 combination sensor for temperature and humidity in a wall housing. It is used for environmental monitoring in industry, storage rooms, smart buildings and pharmaceutical or food warehouses.
Why does the device have two RS-485 addresses?
Temperature and humidity are read out as two independent measurements via the RS-485 bus. Each device therefore receives one address for temperature (uppercase letter) and a separate address for humidity (lowercase letter).
How many sensors can be operated on one bus?
Up to 32 sensors can be connected via a common 4-wire RS-485 bus with integrated power supply, with a maximum bus length of up to 1000 m.
Which devices is the sensor compatible with?
The HTemp-485 Box2 can be read out independently via RS-485 or connected to Poseidon 2250 or Poseidon2 4002. A Poseidon2 4002 can supply up to 4 of these sensors directly with power.
How is the RS-485 address set?
Optionally via jumpers on the board or conveniently in Terminal SETUP mode. Bus termination can additionally be activated via a DIP switch.
Does the sensor need to be recalibrated from time to time?
As with all sensors, accuracy can decrease over time. The manufacturer provides information on this in a dedicated application note and offers the sensor with a calibration protocol on request.
Questions about the HTemp-485 Box2?
Our support team in Germany provides free advice on selection, installation and configuration.
Technical Parameters:
- Temperature measurement range: -10°C to +70°C
- Temperature measurement accuracy: ±0.8°C
- Humidity measurement range: 0% to 100% relative humidity
- Humidity measurement accuracy: 5% RH within the range 0% to 90% (at 20°C to 40°C)
- Supply voltage: +8V to +30V DC with reverse polarity protection
- Protection class: IP 20
- External dimensions: 80 x 64 x 67 mm
- Wall mounting: Attachment with two screws
Interfaces:
- RS-485 communication
- RJ45 connector for RS-485 bus and power supply
- Terminal block for RS-485 bus and power supply
- External gold-plated temperature sensor
- 4-wire bus system
Configuration:
- RS-485 addressing via jumper or terminal SETUP mode
- Up to 32 sensors on one bus (up to 1000m distance)
- DIP switch for RS-485 termination
- 10 kΩ resistors for line idle state
- Simple text communication protocol
- Two different RS-485 addresses per device (temperature and humidity)
Functions:
- Minimal power consumption
- No voltage regulation required
- Temperature values in °C and humidity in %
- Compatible with Poseidon 2250
- Compatible with Poseidon2 4002
- Temperature and humidity measurement as two independent readings
- Protocol compatibility with Temp-485 sensor
LED Indicators:
- Green: Power supply OK
- Yellow: Communication via RS-485
- LED indicator when reading values
Applications:
- Industrial measurement and control systems
- Temperature and humidity measurement in warehouses, industrial, or residential areas
- Technical rooms with data transmission over Ethernet (when connected to Poseidon)
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Software
Manufacturer information:
HW group s. r. o.
Rumunská 26
Prague, 120 00
Czech Republic
Phone: +420 222 511 918
Email: sales@hwg.cz
Responsible person:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
