HIH-4021-003 Honeywell Integrated Circuit (Other) In Stock
Honeywell HIH-4021-003 is an analogue humidity sensor with ±3.5% RH accuracy and a -40°C to +85°C operating temperature range in a 3-pin SIP package. It delivers a ratiometric voltage output proportional to relative humidity for direct ADC interfacing. Available worldwide for HVAC, environmental monitoring, and industrial control applications.
- Manufacturer
- Honeywell
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- HIH-4021-003 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $106.9700(MOQ 1)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- ±3.5% RH accuracy with ratiometric analogue voltage output for direct connection to any ADC input
- Wide operating temperature range of -40°C to +85°C suits demanding industrial and outdoor environments
- Compact 3-pin SIP package simplifies PCB integration with minimal external components required
Applications
The HIH-4021-003 is widely used in HVAC control systems, weather stations, and greenhouse automation where accurate relative humidity measurement across a -40°C to +85°C range is required. Its analogue voltage output interfaces directly with microcontroller ADCs, making it suitable for data-logging instruments, building management systems, and portable environmental monitors. The 3-pin SIP form factor integrates easily into both through-hole PCB designs and sensor module assemblies.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What accuracy can the HIH-4021-003 achieve, and over what humidity range?
The HIH-4021-003 achieves ±3.5% RH accuracy over a 0% to 100% relative humidity sensing range. This level of accuracy is sufficient for most HVAC, environmental monitoring, and process control applications. The sensor's ratiometric analogue output scales linearly with humidity, making it straightforward to compute actual RH from the measured voltage using the supply voltage as the reference.
How does the ratiometric analogue output of the HIH-4021-003 simplify interfacing with a microcontroller?
The HIH-4021-003 produces a ratiometric voltage output that scales directly with the supply voltage, typically ranging from about 0.8 V at 0% RH to 3.9 V at 100% RH when powered at 5 V. Because the output ratio tracks the supply, a microcontroller using the same 5 V supply as its ADC reference automatically cancels supply variations, improving measurement accuracy without requiring a precision voltage reference or signal conditioning circuit.
Can the HIH-4021-003 operate reliably in cold-storage or outdoor environments at temperatures below 0°C?
Yes, the HIH-4021-003 is rated to operate down to -40°C, making it fully compatible with cold-storage warehouses, refrigeration equipment, and outdoor meteorological installations in harsh climates. The sensor maintains its ±3.5% RH specification across the full -40°C to +85°C range, ensuring reliable humidity readings without requiring heating elements or special enclosures in sub-zero environments.
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About Honeywell
Honeywell is a leading electronic component manufacturer. FindMyChip sources Honeywell ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $142.2600 | $142.26 |
| 2+ | $109.1500 | $218.30 |
| 50+ | $108.5100 | $5425.50 |
| 100+ | $106.9700 | $10697.00 |
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