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参数资料
| 型号： | HS1101LF |
| 厂商： | Measurement Specialties Inc/MEAS France |
| 文件页数： | 4/6页 |
| 文件大小： | 0K |
| 描述： | SENSOR RH CAPACITIVE SIDE OPEN |
| 产品目录绘图： | HS1101LF Side |
| 标准包装： | 48 |
| 传感器类型： | 电容性 |
| 湿度范围： | 1 ~ 99% 相对湿度 |
| 工作温度： | -40°C ~ 140°C |
| 灵敏度： | 0.31pF/%RH |
| 精确度： | ±2% @ 10 ~ 90% RH @25°C |
| 响应时间： | 3s（33 ~ 80% RH） |
| 输出： | 电容 |
| 电源电压： | 10V |
| 电容： | 180pF @ 55% RH |
| 产品目录页面： | 2819 (CN2011-ZH PDF) |
HS1101LF – Relative Humidity Sensor
This circuit is the typical astable design for 555. The HS1101LF, used as variable capacitor, is connected to the
TRIG and THRES pin. Pin 7 is used as a short circuit pin for resistor R4.
The HS1101LF equivalent capacitor is charged through R22 and R4 to the threshold voltage (approximately
0.67Vcc) and discharged through R22 only to the trigger level (approximately 0.33Vcc) since R4 is shorten to
ground by pin 7.
Since the charge and discharge of the sensor run through different resistors, R22 and R4, the duty cycle is
determined by:
thigh = C@%RH*(R22+R4)*ln2
tlow= C@%RH*R22*ln2
F = 1/(thigh+tlow) = 1/(C@%RH*(R4+2*R22)*ln2)
Output duty cycle = thigh*F = R22/(R4+2*R22)
To provide an output duty cycle close to 50%, R4 should be very low compared to R22 but never under a
minimum value. Resistor R3 is a short circuit protection. 555 must be a CMOS version.
TYPICAL RESPONSE LOOK-UP TABLE
RH (%)
Fout (Hz)
RH (%)
Fout (Hz)
0
-
55
6600
5
-
60
6550
10
7155
65
6500
15
7080
70
6450
20
7010
75
6400
25
6945
80
6355
30
6880
85
6305
35
6820
90
6260
40
6760
95
6210
45
6705
100
-
50
6650
MEASUREMENT ERROR VS STRAY CAPACITANCE
?
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Special attention is required in order to minimize stray capacitance in the layout. The added capacitance will
act as a parallel capacitance with the sensor and create a measurement error.
A careful coating of PCB and components must be implemented to prevent unexpected deviations of Fout in
high humidity conditions.
HS1101LF HPC052_I
www.meas-spec.com
4/6
October 2012
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HS-1102 | 功能描述:基本/快动开关 SEALED SE RoHS:否 制造商:Omron Electronics 触点形式:SPDT 执行器:Lever 电流额定值:5 A 电压额定值 AC:250 V 电压额定值 DC:30 V 功率额定值: 工作力:120 g IP 等级:IP 67 NEMA 额定值: 端接类型:Wire 安装:Panel |
| HS1102A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| HS1102B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| HS1102C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| HS1103A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
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