LABORATORY PRECIPITATION (RAIN) SYSTEM.

INVITATION FOR BIDS
OFFICE OF PROCUREMENT SERVICES
1. INSTRUCTIONS FOR BIDDERS
a. Sealed bids will be received in the Office of Procurement Services, Mississippi State
University, for the purchase of the items listed herein.
b. All bids must be received in the Office of Procurement Services on or before the bid
opening time and date listed herein. Delivery of bids must be during normal working
hours, 8:00 a.m. to 5:00 p.m. CST, except on weekends and holidays when no
delivery is possible.
c. Bidders shall submit their bids either electronically, in Bully Buy, or in a sealed
envelope. Bids CANNOT be emailed
a. Sealed bids should include the bid number on the face of the envelope as well as
the bidders' name and address. Bids should be mailed to : 405 Garrard Road E,
Starkville, MS 39759.
d. All questions regarding this bid should be directed to the Office of Procurement
Services at 662-325-2550.
2. TERMS AND CONDITIONS
a. All bids should be bid "FOB Destination"
b. Bidders must comply with all rules, regulations, and statutes relating to purchasing
in the State of Mississippi, in addition to the requirements on this form. General Bid
Terms and Conditions can be found here:
https://www.procurement.msstate.edu/procurement/bids/Bid_General_Terms_Ma
y_2019_V2.pdf
c. Any contract resulting from this Invitation for Bid shall be in substantial compliance
with Mississippi State University's Standard Contract Addendum:
https://www.contracts.msstate.edu/resurces/standard-forms
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Bid Number: MSU202671
Opening Date: Wednesday May 13, 2026 at 2:00 p.m.
Description: Laboratory Precipitation (Rain) System
Vendor Name: ______________________________________________________
Vendor Address: _____________________________________________________
Telephone Number: __________________________________________________
Email Address: ______________________________________________________
Days the Offer is Firm: ________________________________________________
Authorized Signature: ________________________________________________
Name: _____________________________________________________________
Title: ______________________________________________________________
Item Quantity Description Unit Price Total Price
1 1 Laboratory Precipitation (Rain) System
MSU Laboratory Precipitation (Rain) System
1. Purpose
Mississippi State University seeks a laboratory precipitation (rain) system capable
of delivering controlled, repeatable rainfall conditions for indoor testing and
research applications.
2. General System Requirements
* Indoor, laboratory-installed precipitation system
* Designed for repeatable, controllable rainfall simulations
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* Complete, integrated system including spray devices, fluid delivery,
controls, and mounting
3. Rainfall Coverage and Performance
* Uniform rainfall coverage over a nominal 12 ft x 12 ft test area
* System shall support multiple distributed spray points to achieve spatial
uniformity
* Adjustable rainfall intensity capable of simulating light to heavy rainfall
conditions
* Vendor shall demonstrate:
Total system flow capacity 120 GPM
o
Controllable flow range spanning at least 20-120 GPM across the test
o
area
* System shall allow continuous or stepwise adjustment of rainfall intensity
during operation
4. Droplet Characteristics
* System shall produce rain-like droplets, not fog or mist
* Droplet output shall be repeatable and consistent across the test area
* Vendor shall specify:
Droplet size range in the approximate order of 1-5 mm (or
o
equivalent rain-like distribution)
Droplet characterization method used
o
* Droplet formation shall remain stable across the operating flow range
5. Spray / Nozzle Assemblies
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* Electrically actuated or electronically controlled spray devices
* Minimum total spray device count: 30-50 units, sufficient to achieve
uniformity over the test area
* Individual spray devices capable of:
Even spray distribution
o
Operation across the specified pressure and flow ranges
o
* Wetted components constructed of corrosion-resistant materials
* Modular layout allowing future reconfiguration
6. Fluid Delivery System
* Closed-loop or direct-feed water delivery system
* Capable of supplying required flow with all spray devices operating
simultaneously
* Vendor shall demonstrate:
Nominal operating pressure range: 60-120 PSIG
o
Maximum system pressure capability 120 PSIG
o
Total flow capacity 120 GPM
o
* Integrated filtration supporting particle sizes 1/4 inch
* Pressure regulation and flow control included
7. Control System
* Centralized electronic control system
* User-adjustable control of:
Individual or grouped spray output
o
Flow rate / rainfall intensity
o
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Timing, cycling, and duration
o
* Minimum control timing resolution sufficient to support:
Short-duration events (seconds)
o
Long-duration steady-state rainfall (hours)
o
* Ability to store and recall multiple test profiles
8. Electrical Requirements
* Vendor to specify voltage, phase, frequency, and current
* System compatible with standard laboratory electrical infrastructure
* Electrical components compliant with applicable safety standards
9. Structural / Mounting Requirements
* Indoor mounting only
* Support structure designed for continuous operation under full-flow
conditions
* Alignment maintained under maximum operating pressure and flow
10. Environmental Operating Conditions
* Indoor laboratory environment
* Designed to operate within:
Ambient temperatures: 40 degreesF to 100 degreesF
o
Relative humidity up to ~90%
o
* Materials suitable for prolonged water exposure
11. Safety and Compliance
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* Emergency shutoff capability
* Electrical and mechanical safety protections incorporated
* Compliance with applicable laboratory and electrical safety standards
12. Documentation and Deliverables
* System layout drawings
* Electrical and control schematics
* Operation and maintenance manuals
* Installation and facility interface requirements
* Training or commissioning support
13. Installation and Support
* Vendor-defined installation scope
* Startup, checkout, and functional verification included
* Warranty and technical support clearly defined
14. Vendor Response Requirements
Vendors shall provide:
* Description of system architecture and operational approach
* Total flow capacity, operating pressure range, and spray device count
* Droplet size range and spray distribution characteristics
* Assumptions and limitations
* Installation requirements
* Schedule and lead time
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