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Humidity With Temperature Sensors

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Product Name:Humidity With Temperature Sensors

Humidity With Temperature Sensors

Application

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Product Description:

Description
    HIH-4602-A/C Series Relative Humidity (RH) sensors combine both relative humidity and temperature sensing in a TO-5 housing with a hydrophobic sintered stainless steel filter.
    The laser-trimmed, thermoset polymer capacitive sensing elements have on-chip integrated signal conditioning.
    The temperature sensor is thermally connected with the RH sensor making the HIH-4602-A/C often ideal for measuring dew point and other absolute moisture terms.
    The HIH-4602-A contains an integral thermistor, while the HIH-4602-C contains an integral precision RTD.

Features

Near linear voltage output vs %RH
Laser-trimmed interchangeability
Enhanced accuracy, fast response
Chemically resistant
Stable, low drift performance
Built-in static protection
Often ideal for dew point and absolute moisture measurements
TO-5 housing

Potential Applications

Refrigeration
Drying
Meteorology
Battery-powered systems
OEM (Original Equipment Manufacturer) assemblies

Performance Specifications (At 5 Vdc supply and 25 ºC [77 ºF] unless otherwise noted.)

Parameter	Minimum	Typical	Maximum	Unit	Specific Note
Interchangeability (first order curve)
0% RH to 59% RH	-5		5	% RH
60% RH to 100% RH	-8		8	% RH
Accuracy (best fit straight line)	-3.5		+3.5	% RH	1
Hysterisis		3		% RH
Repeatability		±0.5		% RH
Settling time			70	ms
Response time (1/e in slow moving air)		50		s
Stability (at 50% RH in one year)		±1.2		% RH
Voltage supply	4		5.8	V_dc
Current supply		200	500	µA
Output voltage temp. coefficient at 50% RH, 5 V		-4		mV/ºC
Voltage output (1st order curve fit)	V_OUT=(V_SUPPLY)(0.0062(sensor RH) + 0.16), typical at 25
Temperature compensation	True RH = (sensor RH)/(1.0546-0.00216T), T in
Operating temperature	-40[-40]	See Figure 1.	85[185]	[ºF]
Operating humidity	0	See Figure 1.	100	% RH	2
Storage temperature	-50[-58]		125[257]	[ºF]
Storage humidity	See Figure 2.			% RH	2

Specific Notes:
1. Device is calibrated at 5 Vdc and 25 ºC.
2. Non-condensing environment.

General Notes:

Sensor is ratiometric to supply voltage.
Extended exposure to >90% RH causes a reversible shift of 3% RH.
Sensor is light sensitive. For best performance, shield sensor from bright light.