Product Description
AVTECH Digital Temperature & Humidity Sensor – 50 ft RJ-11 Cable, Plug-and-Play for Room Alert Monitors
This used AVTECH Digital Temperature & Humidity Sensor is designed for monitoring ambient indoor temperature and humidity in server rooms, data centers, laboratories, and other critical facilities . When connected to a compatible Room Alert environmental monitor, this sensor provides real-time readings for temperature, humidity, heat index, and dew point .
The sensor features a small probe (approximately 2″ long) with a blue cap that contains 24 air holes for accurate airflow around the sensing components . The 50 ft RJ-11 cable allows flexible placement of the sensor away from the monitoring unit, making it ideal for remote monitoring applications .
Condition Note: This unit is untested and sold as-is. This listing is for the sensor only; no Room Alert monitor is included.
Key Specifications
| Specification | Details |
|---|---|
| Manufacturer | AVTECH Software, Inc. |
| Model Numbers | RMA-DTH50-SEN (50 ft) |
| Sensor Type | Digital Temperature & Humidity |
| Cable Length | 50 feet (15.24 m) |
| Connector Type | RJ-11 (standard telephone cable) |
| Temperature Range | -40°F to 185°F (-40°C to 85°C) |
| Temperature Accuracy | ±2°C |
| Temperature Resolution | 0.03125°C |
| Humidity Range | 5% to 95% RH (non-condensing) |
| Humidity Accuracy | ±4.5% RH (5-59% RH); ±6.5% RH (60-95% RH) |
| Power Supply | Powered by Room Alert monitor (via RJ-11) |
| Probe Dimensions | ~2″ L x 3/8″ diameter |
| Maximum Extendible Length | 100 ft total |
| Compatibility | Room Alert 32S, 12S, 3S, 32E/W, 12E, 4E, 3E, 3W, and Wireless Sensor Hub |
| New Price (Shielded 50ft) | $279.00 |
| Condition | Used – Untested |
Key Features & Benefits
| Feature | Benefit |
|---|---|
| 50 ft RJ-11 Cable | Allows remote sensor placement up to 50 feet from monitor |
| Plug-and-Play Operation | Instant recognition by Room Alert monitors; no complex setup |
| Dual Monitoring | Measures both temperature and humidity simultaneously |
| Heat Index Calculation | Room Alert calculates “feels like” temperature from sensor data |
| Dew Point Calculation | Provides moisture level indication (at 45% RH and above) |
| Small Probe Design | Easy installation in tight spaces; mount with cable clips or Velcro |
| Powered by Monitor | No batteries or external power supply needed |



