RainWise MK-III-RTI Wireless Weather Transmitter

: $775.00
: $696.60
You save $78.40!

Availability:: Usually Ships in 1 to 2 Days
Product Code: MK-III-RTI


The RainWise MK-III-RTI features all outside sensor components combined together into a single, compact, easy to install unit. The transmitter on this professional wireless weather station is designed to work with your choice of one of the displays on the right (sold separately). The RainWise Weather Oracle multi-display permits viewing all weather variables simultaneously or you can customize the display, showing only those parameters you select. You have choices on brightness, as well as to wall mount or place free-standing on a table or shelf. This professional wireless weather station comes in four different frame types: black, cherry, or mahogany wood, and black metal.

RainWise MK-III-RTI Features:

  • Manually set time/date
  • Hour/minute, or calendar display
  • Indoor temperature with MIN/MAX records (F or C)
  • Indoor humidity with MIN/MAX records (%RH)
  • Outdoor temperature with MIN/MAX records (F or C)
  • Outdoor humidity with MIN/MAX records (%RH)
  • Outdoor wind chill temperature (F or C)
  • Outdoor dew point temperature (F or C)
  • Outdoor heat index temperature (F or C)
  • Rainfall (Current) with MIN/MAX records (inch/mm)
  • Rainfall (Total) with MIN/MAX records (inch/mm)
  • Self-emptying rain gauge with eight inch diameter rain collector
  • Current absolute barometric pressure with MIN/MAX records (inHg or mb/hPa). Digital offset for site altitude.
  • Barometric pressure trend indicator (rising or falling)
  • Wind speed with MIN/MAX records (mph, km/h, m/s, or knots)
  • Wind direction display with 16 point wind rose, current direction by bright LED and direction variation by dimmer LEDs
  • All MIN/MAX records can be reset on this professional wireless weather station
  • 12 or 24 hour time mode
  • Weather Oracle display unit powered by AC adapter and battery backup
  • Includes rain gauge, anemometer, outdoor thermo-hygrometer, and indoor barometer and thermometer-hygrometer (in Weather Oracle console)
  • Wall mount or free-standing (push in leg bracket)

RainWise MK-III-RTI Specifications:

  • Indoor Temperature range: 32 to 122F (0 to 50C)
  • Indoor Temperature accuracy: 1F (0.5C)
  • Outdoor Temperature range: 66 to 166F (-54 to 74C)
  • Outdoor Temperature accuracy: 0.5F (0.25C)
  • Temperature resolution: 1.0F (1.0C)
  • Humidity range: 0% to 100%
  • Humidity resolution: 1%
  • Humidity accuracy: 2% at 25C (temperature compensated from -40 to 85C)
  • Dew point range: 40 to 140F
  • Dew point accuracy: 2F (1C)
  • Dew point resolution: 1.0F (1.0C)
  • Wind chill range: 58 to 158F (-50 to 70C)
  • Wind chill resolution: 1.0F (1.0C)
  • Heat index range: to 160F (71C)
  • Heat index accuracy: 2F (1C)
  • Heat index resolution: 1.0F (1.0C)
  • Barometric pressure range: 16.3 to 32 inHg
    (551 to 1084 mb/hPa) absolute reading
  • Air pressure resolution: 0.03 inHg (1 mb)
  • Air pressure accuracy: 0.05 inHg (1.69 mb/hPa at 25C). Temperature compensated from -40 to 85 C.
  • Wind speed range: 0 to 150 mph (0 to 67 m/s, 0 to 240 km/h, 0 to 130 knots)
  • Wind speed resolution: 1.0 unit
  • Wind speed accuracy: 2% of full scale
  • Wind direction range: 1 to 360 (Degrees)
  • Wind direction graphical resolution: 22.5
  • Rainfall range: unlimited
  • Rainfall resolution: 0.01 in (0.25 mm)
  • Rainfall measurement: 0.01 inches per tip of bucket
  • Rainfall accuracy: 2% at 1.0 inches/hr
  • Power requirements (base): AC Adapter with 5 AAA Alkaline batteries for backup
  • Transmission interval: every 2 seconds offset by 30 seconds
  • Transmission frequency band: 418 MHz
  • Transmission range: this professional wireless weather station has been factory tested at 433 feet through two factory walls


  • RainWise MK-III-RTI sensor assembly: 16.5" dia. x 33 " tall
    (419mm dia. x 839mm tall)

Multi-display for the MK-III Weather Station Mahogany Multi-display for the MK-III Weather Station Cherry CC-3000 RainWise Enhanced Computer Interface and Weather Data Logger for MRK-III Multi-display for the MK-III Weather Station Black
: $422.00

: $422.00

: $355.00

: $422.00

3' Tripod for MRK III Weather Transmitter Mono Mount for Mrk III
: $57.99

: $59.00


Average Customer Review: 5 of 5 Total Reviews: 1 Write a review.

  0 of 0 people found the following review helpful:
Rainwise MK-III June 29, 2017
Reviewer: Anonymous Person from Blair, NE United States  
Took a little longer to ship than I expected, but communication was good from Scientific Sales.  The station itself was packaged very well and arrived in perfect condition.  Been a Rainwise customer for years and love their products;  they're built solid, report accurately and are very simple to set up.  No complaints at all.

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