Honeywell TrueDRY Humidity Controller HC900
The Honeywell TrueDRY HC900 is an automatic humidity control instrument designed for precise regulation of relative humidity in industrial drying processes. It continuously measures humidity levels using capacitive sensors and adjusts HVAC systems or dehumidifiers to maintain setpoint values, falling under HTS 9032.89.60.70 as a process control humidity instrument per Chapter 90 notes.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If used for laboratory measurement only without automatic regulation
Chapter 90 Note 6 prioritizes measuring instruments in 9031 over controlling ones in 9032 if no automatic feedback
If integral to complete industrial machinery like tablet coating equipment
Parts principally used with specific machines classify with the machine per Section XVI Note 2, not as standalone instruments
If for residential dehumidifiers without separate process control capability
HVAC components without automatic process variable stabilization fall in Chapter 84 air conditioning parts
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Import Tips & Compliance
• Verify instrument meets automatic control definition in Chapter 90 Note 7(b) with continuous feedback loop documentation
• Include sensor calibration certificates and process control end-use declarations to avoid reclassification to 9031
Related Products under HTS 9032.89.60.70
Dwyer Series RHP-EW Humidity Transmitter Controller
Dwyer RHP-EW combines humidity sensing with PID control output for process applications like pharmaceutical drying rooms. It automatically maintains humidity setpoints by modulating humidifiers or exhaust fans based on real-time RH measurements. Classified under HTS 9032.89.60.70 for humidity process control instruments.
Rotronic RMS-Humidity Control Logger
Rotronic RMS series provides humidity control with data logging and alarm relays for pharmaceutical storage validation. Automatically regulates humidity via analog outputs to HVAC systems while recording compliance data. HTS 9032.89.60.70 classification for process humidity control instruments.
CS Instruments FA 550 Humidity Monitor Controller
FA 550 continuous dew point and humidity controller for compressed air systems with alarm relays and 4-20mA outputs. Automatically controls desiccant dryers to maintain process humidity specifications. Classifies under HTS 9032.89.60.70 humidity process control.
Omega RHCM-40 Humidity Chamber Controller
Omega RHCM-40 precision humidity controller for environmental test chambers with stepper motor humidifier control. Automatically maintains ±0.5% RH setpoints for materials testing. HTS 9032.89.60.70 process humidity control instrument.
GE Panametrics Optica Humidity Analyzer Controller
Optica chilled mirror humidity analyzer with automatic control outputs for fuel cell manufacturing humidity control. Maintains trace moisture levels through feedback to process equipment. Classified HTS 9032.89.60.70 process humidity instruments.
Michigan Scientific HCS Humidity Control System
HCS series integrated humidity control for coating processes with capacitive sensing and servo humidifier control. Automatically regulates RH for optimal paint application. HTS 9032.89.60.70 industrial humidity process control.