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Extech Instruments Precision Humidity Meter Model# RH390
Item# 163946
Manufacturer's Warranty: 12 months parts / 12 months labor
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Extech Instruments Precision Humidity Meter Model# RH390
Item# 163946
Only $199.99
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| Style | Analog probe | Nonpenetrating sensor | Nonpenetrating sensor | Combination | Combination |
| Range Selection | 10%28% | 099% | - | 099.9 (relative) | 099.9 (relative) |
| Resolution | - | 0.1% | 0.1%RH, 0.1°F/°C | 0.1% | 0.1, 0.1°F/°C |
| Functions (qty.) | - | - | 6 | - | - |
| Accuracy | - | - | ±2%RH, ±1.8°F/1°C | - | 8:1 distance to spot ratio and 0.95 fixed emissivity |
| Measures up to (in.) | 1/8 | Measurement depth to 0.75 in. below surface | - | 0.75 in. (22mm) below the surface | To 0.75" (19mm) below the surface |
| Alert Priority | - | - | - | - | Yes |
| Low Battery Indicator | - | Yes | Yes | Yes | Yes |
| Battery Included | No | Yes | Yes | Yes | Yes |
| Battery Type | 9V | 9V | 9V | 9V | 9V |
| Backlit Display | - | Yes | Yes | Yes | Yes |
| Display Type | Analog | LCD | Dual display | Digital LCD | Dual display |
| Auto On/Off | No | - | Yes | Yes | Yes |
| Dimensions L x W x H (in.) | 2 3/4 x 1 1/2 x 3 3/4 | 5 7/16 x 2 13/16 x 1 1/8 | 7 13/16 x 1 11/16 x 3 | 2 1/3 x 1 3/4 x 8 | 6 1/2 x 3 x 1 1/2 |
| Case Included | - | Yes | Yes | Yes | Yes |








