Extech 445715 Big Digit Remote-Probe Hygro-Thermometer
- 10 to 99% RH humidity range, +/- 4% RH
- -10 to 60 C (14 to 140 F), +/- 1 C
- 18 inch remote probe cable
- Min/Max memory with reset
- Rear calibration pots
- 1 AAA battery, **1 year** warranty
Last refreshed Oct 3, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A hygro-thermometer for storage rooms and labs, with a probe for ducts and tight spots. The calibration pots and NIST option suit lab and storage monitoring.
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ASIN: B000NI4AQYModel: 445715Category: Hygrometers
Overview
Not a pocket thermometer, this is a desk or wall meter with a big dual display and a separate probe on a cable. It reads temperature and humidity, holds minimum and maximum values, and has rear pots for calibration.
A remote probe reaches ducts and enclosed spaces, and stored extremes show swings over time. It runs on a single small battery, and the NIST certificate is an optional extra.
Who it's for
Offices, storage rooms and labs that need readings in two places benefit from the probe cable. Users who want logging to a phone, or who need very wide ranges, should choose another instrument.
Pros and cons
- Large dual display
- Remote probe on a cable
- Min/Max memory with reset
- Calibration pots at the rear
- Probe cable length is fixed
- Humidity range stops short of the extremes
- No wireless data output listed
Performance notes
The probe senses temperature and humidity away from the meter, so readings from a duct or enclosure display on the desk unit. Calibration pots let the user trim the readings, and the memory function records the highest and lowest values since reset.
Specifications
| Brand | Extech |
|---|---|
| Model | 445715 |
| Dimensions & fit | |
| Probe cable | 18 inches |
| Weight | 0.19 kg |
| Capacity & performance | |
| Humidity range | 10 to 99% RH |
| Temperature Accuracy | +/- 1 C (+/- 1.8 F); +/- 4% RH |
| Temperature range | -10 to 60 C (14 to 140 F) |
| Power & efficiency | |
| Battery Description | 1 x AAA (1.5V) |
| Included components | |
| Included Components | Sensor probe with 18 inch cable, mounting bracket, stand, battery |
| Warranty & support | |
| Warranty Description | 1 year |
| Other details | |
| Additional Features | MIN/MAX memory, reset, calibration pots, dual display |
Closest rivals on specs
AcuRite 01136M Wireless Thermometer with Indoor/Outdoor Temperature and Humidity- Upper Temperature Range 140 vs 158 °F (-11%)
Taylor Indoor Hygrometer Weather Resistant Humidiguide/Thermometer- LowerTemperature Range 14 vs 20 °F (-30%)
- Upper Temperature Range 140 vs 120 °F (+17%)
- Item Weight 0.42 vs 0.3 pounds (+40%)
WiFi Hygrometer Thermometer with Swiss Sensor 3 Pack- Item Weight 0.42 vs 0.13 pounds (+223%)
Frequently asked questions
What is included with the Extech 445715 meter?
The package includes the meter, a sensor probe with an 18 inch cable, a mounting bracket, a stand and one AAA battery.
Can the Extech 445715 be wall mounted?
Yes, the description says it can be used on a desk or mounted on a wall, with a bracket and stand included.
Is a NIST certificate included with the Extech 445715?
No. The description lists an optional NIST-traceable certificate.