If you are looking a drip-less operation for a drip irrigation system in your greenhouse, the Vibro Spray Sprinklers are best choice, constructed without a "bridge" to retain the spinner.
VibroNet™
VibroNet™
Mist/Water Vibronet Blue
Netafim VibroNet Green Sprinkler 13.2 Gph - Grower's Solution
Netafim - Greenhouse and Nursery Division - VibroNet ...