Description
Komatsu AIH-123QS-PP-UC
Technical Specifications
- Product type: Ceramic piezoresistive pressure transmitter
- Range: Selected by model
- Output: 4 to 20 mA two-wire
- Supply: DC10 to 30 V
- Accuracy: ±0.5 % FS
- Long-term stability: ±0.1 % FS/year
- Process connection: Universal thread
- Wetted parts: Ceramic 316L stainless steel
- Protection: IP65
- Temperature: -20 °C to +80 °C
- Storage: -40 °C to +100 °C
- Humidity: 0 to 95 %, non-condensing
- Overload: 2 × range
- Installation: Direct threaded mounting
Functional Features
- Ceramic piezoresistive element corrosion and wear resistant
- 4 to 20 mA two-wire standard output
- ±0.5 % FS accuracy
- Strong overload resistance, 2 × range without damage
- 316L stainless steel process connection
- IP65 protection for humid industrial environments
- Good long-term stability
- Vibration and shock resistant design
- Universal threaded process connection for interchangeability
- Wide DC10 to 30 V supply
Application Scenarios
- Komatsu construction machinery hydraulic pressure monitoring
- Industrial hydraulic station pressure measurement
- Water treatment network pressure monitoring
- Pneumatic system pressure detection
- General industrial process pressure transmission
Materials and Construction
- Process connection: 316L stainless steel
- Sensing diaphragm: Alumina ceramic
- Housing: Stainless steel
- Electronics: FR4 PCB
- Cable/connector: Industrial waterproof connector
- Seal: FKM O-ring
Structural Features
- Cylindrical stainless steel housing with front process thread
- Ceramic diaphragm at front pressure port
- Rear electrical cable or connector output
- Internal bridge and amplifier integrated
- Direct thread screw-in to process pipe
- Compact for narrow mounting spaces
Working Principle Process pressure acts on the ceramic diaphragm, which deforms slightly; diffused piezoresistive strain gauges on the diaphragm form a Wheatstone bridge whose output voltage changes with pressure. The amplifier converts the mV signal to a 4 to 20 mA current sent to a secondary instrument or PLC. DC10 to 30 V supply shares the two wires.
Installation Requirements
- Wrap seal tape on process thread and screw into pipe
- Mount away from vibration and heat radiation
- Tighten waterproof cable gland for IP65
- Stable DC24 V supply
- Shield signal wires away from power cables
- Cabinet temperature -20 °C to +80 °C
- Calibrate zero and span after power-up
Precautions
- Measured medium must not corrode 316L or ceramic
- Do not exceed range
- Correct wiring polarity
- Install isolation valve for hydraulic maintenance
- Store spares in dry environment
- Periodically calibrate pressure zero
