Hadiyah Develops Tanker-Mounted Mist Sprayer for Pilgrim Cooling
Engineering updates following 2025 Hajj field testing include revised nozzles, water-pressure adjustments and a platform with 360-degree rotation.
MECCA, Saudi Arabia — November 15, 2026 — Hadiyah, a Saudi charity serving Hajj and Umrah pilgrims, has developed a tanker-mounted mist sprayer intended to provide cooling in crowded outdoor areas, with engineering changes informed by field testing during the 2025 Hajj season.
The development update details changes to spray nozzles, water pressure and the rotating platform. It describes how observations from equipment operation around moving crowds were used to guide mechanical revisions.
Development began in early 2025 with an assessment of pilgrims’ needs and a review of available technologies and operating experience in Saudi Arabia and abroad. Hadiyah worked with an American engineering partner on mechanical development and manufacturing within Saudi Arabia.
Five engineers from the technical partner supported equipment operation, field activities and maintenance during testing. Their involvement connected the engineering work with observations of how the equipment operated in pilgrimage settings.
Engineering changes informed by field testing
Following the 2025 field testing, the development team replaced the spray nozzles three times and adjusted water pressure. These changes were intended to improve mist distribution at both shorter and longer distances. The team also addressed concerns about operating noise.
A raised, automatically rotating platform was developed to expand the equipment’s rotation from 270 to 360 degrees. The platform was also designed to improve stability during operation.
The principal changes described in the update are:
Revisions to spray nozzles and water-pressure settings to improve mist distribution.
Work addressing operating-noise concerns identified during testing.
A raised platform with automatic rotation through 360 degrees, compared with the earlier 270-degree range.
The tanker-mounted configuration allows the equipment to be repositioned and directed according to operational needs and wind direction. These factors remain relevant to mist distribution in outdoor settings, where equipment placement must account for changing conditions and crowd movement.
Scope of the development update
The November 2026 update documents engineering revisions following the 2025 Hajj field testing. The changes represent development work on the equipment; they are not presented as measured evidence of a specific reduction in outdoor temperature or heat exposure.
The update does not include quantified results for cooling performance, water consumption or noise reduction. It also does not specify a deployment timetable or announce approval for wider use. The intended benefits of the nozzle, pressure and platform changes should therefore be distinguished from independently demonstrated operating outcomes.
The project forms part of Hadiyah’s work to connect research and development with observations from pilgrim services, using operational feedback to guide equipment changes.
About Hadiyah
Hadiyah is a Saudi charity based in Mecca. Established in 2009, it serves Hajj and Umrah pilgrims and visitors through programs providing drinking water, meals, education and practical assistance in Mecca, Medina and along pilgrimage routes. For more information, visit www.hadiyah.org.sa.
Media Contact
Ministry of Hajj and Umrah Media Center
Phone: 00966920002814
Email: media@rga.gov.sa
Website: haj.gov.sa/ar/Umrah
Mecca, Saudi Arabia