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| Harmon SO2 generators were very common in California's Southern San Joaquin Valley. The soil PH has changed from alkiline to acid in many places, so they are not common now. The exception is where the irrigation water has a lot of salt in it. http://companydatabase.org/c/waste-water-treatment/design-water/wat...
Pros.
They work
Cons.
Expensive, they are made of stainless steel.
They need electrical power to operate. There are two small three phase powered pumps on each one if I remember correctly.
If you do not pay attention, the acid created will destroy a concrete pipeline.
Eye watering, choking vapor emitted. Caution is needed when adding sulfur.
They are still being manufactured, but I do not know exactly where. They were made in Bakersfield, CA. Search for Harmon SO2 burner, a Rocket Shop Cafe will probably come up. That is owned by John Harmon's son, I think. Someone there will know how to get one.
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Sulfer burner for irragation water
