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Sensor for harsh environments in light grey enclosure with blue front label, sui
Sensor for harsh environments in light grey enclosure with blue front label, sui
Sensor for harsh environments in light grey enclosure with blue front label, sui
Sensor for harsh environments in light grey enclosure with blue front label, sui
Sensor for harsh environments in light grey enclosure, suited for surface mounti
Sensor for harsh environments in light grey enclosure
PCB mounted in a light grey plastic enclosure suited for surface mounting

Outdoor temperature humidity TVOC sensor - 24 VDC PoM supply


Product description

This is a multifunctional outdoor transmitter. It measures temperature, relative humidity, air quality and ambient light. It can be used in harsh environments or outdoor. The supply voltage is 24 VDC PoM - this means that Modbus RTU communication and 24 VDC power supply can be connected via one RJ45 connector. The measured values are transmitted via Modbus RTU communication. The TVOC sensor element is replaceable. In many applications, the ambient light sensor can be used to control the ventilation system in function of the occupancy of the room. All settings can be adjusted via Modbus RTU.


Article code ODVCM-R
Category Outdoor TVOC sensors
Available
Current stock 5 U.
Factory lead time 4 Week(s)
Documents

Additional specifications and description


The key features are:
- Suitable for harsh environments
- Equivalent CO2 level (CO2eq) is calculated based on the TVOC measurement
- Selectable temperature, relative humidity and TVOC ranges
- Bootloader for updating the firmware via Modbus RTU communication
- Day / night detection via ambient light sensor
- Ambient light sensor with adjustable ‘active’ and ‘standby’ level
- Modbus RTU (RS485)
- Removable TVOC sensor element for easy calibration and verification
- Long-term stability and accuracy
- Monitoring of temperature, relative humidity and TVOC levels


Frequently asked questions

:
In general, the difference is the supply voltage:
-M version: The –M versions are Power over Modbus supplied with 24 VDC via an RJ45 socket. They do not feature a physical out, however, there is an output value generated and read via Modbus RTU. When combining multiple Sentera products via Modbus RTU, we advise to use –M or -F series.

-F version: The –F version is supplied with 18 - 34 VDC via a terminal block and features physical outputs. The -F version of the product is not suited for 3-wire connection. It has separate grounds for power supply and analogue output. Connecting both grounds together might result in incorrect measurements. Minimum 4 wires are required to connect -F type sensors. When combining multiple Sentera products via Modbus RTU, we advise to use –M or -F series.

-H version: The –H version is a combination of –M and –F series. They can be supplied via Power over Modbus (24 VDC via an RJ45 socket) or via the terminal block, whichever the customer prefers. The –H series also features physical outputs via the terminal blocks.

-G version:  The –G version features 18 – 34 VDC or 15 – 24 VAC. The -G version is intended for 3-wire connection and features a ‘common ground’. This means that the ground of the analogue output is internally connected with the ground of the power supply. In case a Sentera sensor will be connected to other, non-Sentera branded products, we advise to use –G series.
VOC or Volatile organic compounds are known to cause eye, nose and throat irritations, headache, drowsiness, dizziness, nausea, difficulty concentrating and fatigue. VOC in indoor environments evaporate from substances such as cleaning products, adhesives, paints, new carpets, copiers and printers to building materials and furnishings. VOC are also emitted from humans and animals in their breath, sweat and directly from their skin. Therefore, it is important to monitor the VOC levels and to extract the contaminated air from the area.

TVOC or Total Volatile Organic Compounds correspond to the sum of the different VOCs in an air sample. TVOC gives a more correct picture of the air quality, since it does not measure a single compound, but the sum of all individual VOCs.