Modbus temperature sensor for standard and special applications

Modbus temperature sensors for various types of applications

There are several different versions of Modbus temperature sensor according to their application requirements. The key questions are: What needs to be measured and how it needs to be measured?

• Gas or liquids – different probes,
• Inside or outside application or application within special environments (e.g. ducts, cables, )
• Standard measuring ranges or special measuring rangers (e.g. temperature up to +200 °C, +400 °C, + 600 °C).
• Whether the sensor has to be in direct contact (e.g. measuring temperature on round surfaces such as pipes.)
• Different material requirements: e.g. stainless steel or brass versions.
• Different casings: available in either indoor, outdoor, or pipe fitting versions.
• Different IP protection: IP30, IP65

The entire Andivi Modbus product assortments consist of the following Modbus Temperature Sensors:

Measuring range and measuring accuracy

Sensors has a measuring range from -50 °C to +100°C white the measuring accuracy interval is +/-  0.2 K (°C)  + max. 3% from end value.

The accuracy of the standard passive sensors is +/- 0.2 °K +/- 1% full scale – after 60 minutes of operation at the desired placement in the room.

Various Connection types

Modbus sensors are available with a standard 3-wire connection (at 4-20 mA optional 2-wire connection).

LED Display with current read values

Most variations of sensors are optionally available with a built-in sensor LED display. This cost-efficient display allows.

Mounting

Optimum control requires accurate measurements. For optimal use, please follow the following mounting advice that is proposed by technical practitioners for outdoor temperature sensors:

• Avoid exposure to direct sunlight and attach the sensors to the building wall that faces away from the sun, (usually the north side).
• Avoid mounting on facades with a great deal of ascending heat,
• Avoid attaching to walls in front of a chimneys,
• Avoid mounting on eaves / balconies,
• Avoid placing over windows,
• Avoid placing over ventilation shafts,
• Avoid placing painting over sensors,
• Place sensors in an accessible location this will enable easy inspection and maintenance

Outdoor Modbus temperature sensors should be placed in the middle of the building or in the heating zone – at least 3 m above the ground.
Indoor temperature sensors should be placed at a height of approx. 1.5 m and a distance of at least 50 cm from the nearest wall. For indoor temperature sensors practitioners also suggest:

• Avoiding external walls,
• Avoid covering the sensors with curtains or other material.
• Avoid locations near to air flows,
• Avoid locations near to heat sources,

Maintenance of sensors

To maintain accurate temperature, humidity and CO2 sensing, remove dust as necessary from the ventilation holes in the top and bottom of the case.

Warranty of Modbus Sensors

All Andivi Modbus temperature sensors come with a standard warranty of 3 years. All sensors are of high-quality in robust casings and vouch for precise measurement.

Accurate room temperature and mounting height

Traditionally, room Modbus temperature sensors have been mounted approximately 1,5 m from the floor. This has been considered an effective height to measure the room temperature (in most cases). This is slightly above the middle height of the average person.

Large rooms demand the application of not only one, but several sensors in one room. Average room temperature is then taken based on all the sensors – this is computed within the DDC controller and thermostats are accordingly adjusted.

Large rooms allow for higher deviations as part of the room could be relatively warm while the center of the room could be perceived as comparatively hot.

Modbus Datalogger

If you need to log temperature data and are in need of data acquisition hardware and software you can connect standard data loggers or a multi-purpose DDC Controller like Andivi U-DDC, where you can not only log data but also aggregate it, compare it and use it in multi-variable analytics processes.

For example, compare temperature, humidity and pressure data, energy use data or any other device logs on a comparative timeline. This can be applied for history backlog analysis or real-time reading.

With the U-DDC automation station, you can easily program the software to also send e-mail or SMS notifications in case of Alarms, Malfunctioning or Recommendations based on any value settings (e.g. define switch values).

Need custom Modbus sensors?

If you are looking for Modbus sensors that need to be individually designed for your special applications, look no further. The R&D department at Andivi can help you with the development and production of tailor-made sensors for any kind of application.