Tachometer/Line Speed Meter  
A Series (72mm*72mm)  
Tachometer (4-digit) RLA-40K
F Series (96mm*48mm)  
(RF-40A / RLF-40A) Tachometer/Line Speed Meter RF-40A (Tachometer)
  RLF-40A (Line Speed Meter)
(RLF-40K) Tachometer/Line Speed Meter RLF-40K
F Series (96mm*48mm)  
(RF-40A / RLF-40A) Tachometer/Line Speed Meter RF-40A (Tachometer)
  RLF-40A (Line Speed Meter)
(RLF-40K) Tachometer/Line Speed Meter RLF-40K
S Series (48mm*24mm)  
Mini-type Tachometer/Line Speed Meter RS-N(P)-XM
Conch Vietnam, Conch sensor Vietnam, Conch electronic Vietnam,