Quick view Compare Add to Cart The item has been added ACI ACI Q5-O2-25V-O-X : Smart Sensor, Oxygen, 0-25%V, 3 SPDT Relays, NEMA 4X, 4-20mA, 2-10V, or Modbus RTU MSRP: Was: Now: (Inc. Sales Tax) MSRP: $1,690.00 Was: Now: $811.10