The all in one weather station MP300 from Shenzhen Theta Instrument Co., Ltd is a compact unit that measures air temperature, relative humidity and barometric pressure in one housing. The product page describes it as an all in one weather station built to reduce operating and maintenance costs, because one station covers up to three parameters instead of several separate sensors. Digital and analog interfaces are provided so the readings can be integrated into existing monitoring systems. The MP300 sits in the MP series, a group of sensors with different parameter combinations, and the page invites buyers to choose the combination that fits the application.

Three Parameters in One Housing

The MP300 measures barometric pressure from 10 to 1100 hPa with an accuracy of plus or minus 0.5 hPa and a resolution of 0.1 hPa. Air temperature is measured from minus 40 to plus 80 degrees Celsius with an accuracy of plus or minus 0.5 degrees Celsius, or plus or minus 0.3 degrees Celsius as an option, and a resolution of 0.1 degrees Celsius. Relative humidity covers 0 to 100 percent RH with an accuracy of plus or minus 3 percent RH and a resolution of 0.1 percent RH. These are the three parameters named on the product page. A buyer who needs wind, rain or solar radiation should ask the factory which model in the MP series carries those sensors, because the page presents them as separate combinations rather than as MP300 features.

Housing and Installation

The MP300 housing is rated IP66. Its dimensions are given as 145 mm in height and 126 mm in width, and the weight is 0.8 kg. The compact shape and the all in one design are intended to simplify installation on a mast or a structure, since there is no separate set of sensor heads to mount and wire. The operating temperature range is minus 40 to plus 70 degrees Celsius and the operating humidity range is 5 to 100 percent RH. The connector is a 4 pin type and the supplied cable is RVVP with a length of 5 m. A buyer planning a long cable run or a specific connector should confirm the final arrangement with the factory.

Outputs and Protocols

The MP300 provides analog outputs of 4 to 20 mA and 1 to 5 V. The default digital interface is RS-485, and RS-232, SDI-12 and RS-422 are listed as optional. The communication protocol can be Theta ASCII as an option, with MODBUS, SDI-12 and NMEA also listed as optional. The power figure on the page is 12 mA at 12 VDC, and the operating voltage range is 12 to 30 VDC. These options matter at the planning stage: an integrator can match the output to a PLC, a data logger or a gateway, but the exact combination has to be ordered, because the page marks several interfaces and protocols as optional rather than standard. The page does not state which combination is fitted as standard for a given order, so the quotation should list each interface and protocol explicitly.

What to Confirm Before Ordering

The product page gives ranges, accuracy, resolution, housing, output, protocol, power, dimensions and weight, and those figures can be used to prepare a technical comparison. It does not give a price, a delivery time or a minimum order quantity, so those points belong in the quotation. It also does not state a calibration interval or a warranty term. A buyer should ask for the calibration policy, the warranty, the connector and cable specification, and the exact protocol option that will be supplied. When the station will be installed in a coastal, dusty or high altitude location, the buyer should describe the site so the factory can confirm whether the IP66 housing and the stated operating ranges are suitable. The final selection should be based on the site conditions and the data system that will receive the readings.

Theta Instrument describes its work as sensor design and development based on a modular concept, and the MP series is presented as a flexible building block for weather applications. The company lists weather stations, air quality stations, anemometers, flow meters and solar radiation sensors, together with application pages for wind power, solar PV, power grid and substation, environmental, agriculture, air quality and traffic meteorology monitoring. Its address is Room 1304, Building 31, Lianchuang Science Park, Bulan Road, Longgang District, Shenzhen, 518114, China, and the contact details on the page are +86 755 8323 2645 and info@thetainst.com.

If you need an all in one weather station for temperature, humidity and pressure, send us the site description, the number of points, the interface and protocol you plan to use, the cable length and the quantity. We will confirm the MP300 configuration, the optional items and the delivery plan, and we will point out the figures that should be checked against your data system. A clear brief at the start keeps the order simple and avoids a station that measures the right parameters but does not connect to the rest of the project.