---
source: huluic.cn
data_as_of: 2026-10-19T05:31:38.133Z
max_staleness: 1h
cached: false
source_url: https://huluic.cn/product/extech/RH490/qp1mLJBr
---

# 元件详情：RH490

- **型号**: RH490
- **oneic 编号**: 457-RH490
- **厂商**: Extech Instruments
- **描述**: Precision Hygro-Thermometer Thermo-hygrometer; -30÷100°C; 0.1°C; 0÷100%RH; 0.1%RH Precision Hygro-Thermometer with Digital LCD Display

## 规格参数

### 合规参数

| 参数 | 值 |
| --- | --- |
| 标准 | CE Marked, NIST Standard |

### 电气参数

| 参数 | 值 |
| --- | --- |
| 精度 | ±2% |
| 分辨率 | 0.1% RH |
| 显示类型 | LCD |
| 输入功率 | 1 battery 9V 6F22 |
| 供电电压 | Battery |
| 分辨率（位） | 0.1°C |

### 机械参数

| 参数 | 值 |
| --- | --- |
| 宽度 | 1.7in |
| 高度 | 1.3in |
| 长度 | 7.8in |
| 重量 | 200g |
| 本体尺寸 | 200 x 45 x 33mm |
| 尺寸/外形 | 7.8 x 1.7 x 1.3in |

### 产品信息

| 参数 | 值 |
| --- | --- |
| 产品特性 | Dual Backlit Display, Simultaneous Display of Humidity or GPP Plus Temperature, Min/Max Functions, Auto Power Off with Disable and Low Battery Indicator |
| 包含附件 | 9 V Battery, Carrying Case |
| 仪表类型 | thermo-hygrometer |
| 制造商全称 | Extech |
| 产品子类型 | Precision Hygro-Thermometer |
| 测量范围 | 0...100% RH |
| 单元数量 | 1 |
| 电池化学类型 | 9 V Battery |

### 环境参数

| 参数 | 值 |
| --- | --- |
| 测试温度 | -30...100°C |
| 感应温度 | -22°F |
| 最高温度限值 | +199°F |

## 实时报价

> 报价接口（需 API Key）：`https://r.huluic.cn/v2/offers/RH490`

> 现货购买：[huluic.cn 产品页](https://huluic.cn/product/extech/RH490/qp1mLJBr?utm_source=huluic&utm_medium=md&utm_campaign=geo)

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数据来源：[huluic.cn](https://huluic.cn)