F Type:Helical tube pressure gauge, for medical use or fire extinguisher use.

L Type: Capsule low pressure gauge

N Type: Safety process pressure gauge

O Type: Gas test gauge. black steel case, black steel bezel, plastic window, brass internal and connection, with steel chrome plated gas test body.

Q Type: Ammonia gauge, black steel case, black steel bezel, glass window, 316 stainless steel tube, steel chrome plated socket and connection, dry

R Type: Refrigeration gauge with refrigeration scale

T Type: Tire gauge

W Type: Water test gauge. black steel case, snap on plastic window, with red indicator for max reading record, brass internal and connection, with brass water test hose.

X Type: Diaphragm chemical seal pressure gauge

Z Type: Magnetic electrical contact pressure gauge