Pilot Balloon Water Activated Lighting Unit
The water activated lighting unit dunked in a bucket of water and then tied to a balloon for night time observations. It uses a water activated battery. They are shipped in lots of 10 in the can pictured. The lighting units are packed in desiccant to preserve the battery power.
VIZ http://www.sippican.com/meteorological.html manufactured the Pibal lighting unit pictured below as well as a line of radiosonde units, some that are in current use. VIZ was purchased by Sippican Inc. They are now located at 7 Barnabas Road, Marion MA 02738. As far as I can tell from their site, they only make modern Radiosonds, and not lighting units.
Check Novalynx for availability and pricing of Pibal Lighting Units
 |
Photo of a Type S Pibal Lighting Unit.
VIZ Manufacturing, 335 E. Price Street Philadelphia PA 19144 is the address on the container. |