The Vaisala HUMICAP® Humidity and Temperature Probe HMP3, order configuration code HMPX 3K1B1A0A0B0, is 100% designed, engineered, and manufactured in Finland by Vaisala Oyj – the world benchmark in high-precision measurement instrumentation. Operating within the Vaisala Indigo ecosystem, the HMP3 is an intelligent general-purpose probe specifically optimized for ventilation duct installations, central air handling units (AHU/HVAC), and demanding industrial processes that necessitate long-term measurement stability, uncompromised accuracy, and minimal lifecycle maintenance.

At the technological core of the HMPX 3K1B1A0A0B0 is the advanced Vaisala HUMICAP® R2 Composite thin-film capacitive polymer sensor coupled with a Pt100 RTD Class F0.1 platinum temperature resistor. The HUMICAP® R2 Composite sensor features a reinforced protective micro-structure that supports chemical sensor purge capability. During purge cycles, the sensor briefly heats up to evaporate and volatilize airborne industrial chemicals, solvent vapors, and cleaning agents, entirely preventing zero-point calibration drift and ensuring exceptional accuracy (±0.8 %RH). In this specific configuration, start-up purge, interval purge, and continuous probe heating are preset to off, delivering minimal power consumption suitable for standard environmental and duct measurement streams.

Built for heavy industrial duty, this model integrates a 10-meter high-flexibility cable (10m cable), empowering maintenance teams to route wiring across high-ceiling ductwork, mechanical chases, or elevated plenum spaces back to central control enclosures without intermediate junction splices. The sensing head is shielded by a robust sintered stainless steel filter cap (P/N: HM47280SP), preventing mechanical erosion from high-velocity airborne dust particulates. Delivered complete with a dedicated Duct Installation Kit for HMP3/HMP7 (P/N: 210697), an English factory calibration certificate, and factory-assigned Modbus address 240, the probe provides true plug-and-play interoperability when mated with Vaisala Indigo520, Indigo200 transmitters, or the Indigo80 handheld indicator.

• Manufacturer: Vaisala Oyj
• Origin: 100% Finland
• Product Series: Intelligent Humidity & Temperature Interchangeable Smart Probe
• Configuration Order Code: HMPX 3K1B1A0A0B0
• Probe Head Type: HMP3 General Purpose Probe for duct and industrial applications
• Integrated Cable Length: 10 meters (32.8 ft) heavy-duty industrial cable
• Humidity Sensor: Vaisala HUMICAP® R2 Composite (supports chemical sensor purge)
• Temperature Sensor: Pt100 RTD Class F0.1 complying with IEC 60751
• Protective Filter Cap: Sintered Stainless Steel Filter (P/N: HM47280SP)
• Purge & Heating Status: Start-up purge off, interval purge off, probe heat off
• Modbus Address Configuration: Pre-configured to Address 240 (Use with Indigo transmitters)
• Relative Humidity Measuring Range: 0 … 100 %RH
• Humidity Accuracy at +23 °C (+73.4 °F): ±0.8 %RH (0 … 90 %RH); ±1.5 %RH (90 … 100 %RH)
• Operating Temperature Range of Probe Head: -40 °C to +120 °C (-40 °F to +248 °F)
• Temperature Accuracy at +23 °C: ±0.1 °C (±0.18 °F)
• Calculated Parameters: Dew point temperature (Td), absolute humidity, mixing ratio, wet bulb temperature, enthalpy
• Communication Protocol: RS-485 Modbus RTU
• Ingress Protection Rating: IP66 (Probe head and body)
• Included Mounting Hardware: Duct Installation Kit for HMP3/HMP7 (P/N: 210697)
• Calibration Documentation: Standard factory calibration certificate in English
• Host Compatibility: Vaisala Indigo520 / Indigo200 series transmitters, Indigo80 handheld indicator, and Vaisala Insight PC software
• Applicable Industries: Commercial and industrial HVAC/AHU duct networks, automotive paint spray and drying booths, GMP pharmaceutical facilities, semiconductor and electronics manufacturing, lithium battery dry rooms, food processing, cold chain warehousing, and industrial drying chambers.