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Environmental Sensors (Spec Sheet)

The PathSpot™ PowerTemp™ Temperature & Humidity Loggers are industrial-grade wireless sensors designed to monitor environmental conditions with precision and reliability. Featuring a compact, low-profile design, they enable discreet installation in a variety of settings.

Data is transmitted via the LoRaWAN™ protocol, offering long-range communication and exceptional signal penetration, even through fully metal-lined refrigeration units, freezers, and building structures. In unobstructed environments, line-of-sight range typically exceeds half a mile.

For applications requiring continuous or high-accuracy temperature monitoring, an optional external temperature probe is available. The probe connects to the logger via a 2-meter cable, providing flexibility for remote or immersion-based measurements. This is not required to be utilized if only ambient temperatures are needed

 

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🔧 Key Features of the PathSpot™ PowerTemp™ Logger

  • 🌡️ Built-in Temperature & Humidity Sensor
    Accurately monitors environmental conditions with factory-calibrated precision.

  • 🌡️ Optional External Temperature Probe
    Ideal for harsh environments or continuous temperature tracking (e.g., food storage).

  • 📡 LoRaWAN™ 1.0.3 Class A Compliant
    Fully over-the-air (OTA) configurable for seamless setup, remote updates, and data retrieval.

  • 🟢 Tri-Color LED Indicator
    Instantly view device status with intuitive visual feedback.

  • 🏗️ Industrial-Grade Housing
    Durable shell, designed to withstand LIGHT splashes and sprays (IP65-rated).
    Flanged base allows for easy mounting on walls or equipment.
    DO NOT DIRECTLY SPRAY WITH WATER OR LEAVE IN EXTREMELY HUMID ENVIRONMENTS 

  • ⚙️  Factory Calibrated & OTA Adjustable
    Ships pre-calibrated, with calibration parameters remotely adjustable via OTA commands.

  • 🗄️  On-Device Data Logging
    Configurable local storage for up to 3,328 records when offline.
    Data is automatically retrievable via OTA when reconnected.

  • 📊 Integrated PathSpot™ Web Portal
    Enables streamlined data visualization, device management, and customizable alerts directly on your PathSpot Dashboard.

  • ✅ Certified for Compliance
    Fully FCC and CE certified for global use.

📐 Technical Specifications: PathSpot™ PowerTemp™ Logger

🌡️ Temperature Monitoring

Built-In Temperature Sensor

  • Resolution: 0.01 °C

    • The smallest temperature change the sensor can detect 

  • Accuracy: ±0.3 °C (0 to 80 °C)

    • The reading's tolerance

  • Operating Range: -40 to 80 °C

    • The temperature range where the sensor can reliably work without damage or errors.

  • Sensor Drift: < 0.02 °C/year

    • How much the Sensor accuracy can drift year over year

External Temperature Probe (Optional)

  • Resolution: 0.0625 °C

  • Accuracy:

    • ±0.5 °C (–10°C to 80 °C)

  • Operating Range: –40°C to 125 °C

  • Sensor Drift: < 0.02 °C/year

💧 Humidity Monitoring

  • Resolution: 0.04 %RH (Relative Humidity)

  • Accuracy: ±3 %RH

  • Operating Range: 0 to 96 %RH

  • Sensor Drift: < 0.25 %RH/year

Relative Humidity (RH)

  • 0% RH = completely dry air (no moisture).

  • 100% RH = air is fully saturated with water vapor (can’t hold any more).

🔋 Power & Battery

  • Battery Type: CR17450 Lithium-Ion

  • Battery Capacity: 2400 mAh (milliamperes/hour)

  • Operating Voltage: 3 V (volts)

  • Operating Current:

    • Range: 20 mA – 150 mA (millampere)

    • Typical: 0.43 mA 

      • When broadcasting; at rest it is virtual 0.0 mA. Temperature also impacts battery life.

  • Battery Life:

    • Typical: 5 years (without probe), 3 years (with probe)

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📡 Wireless Communication

  • Protocol: LoRaWAN Specification 1.0.3, Class A

  • Transmit Power Options:

    • 125 mA @ 20 dBm (long-range, higher consumption)

    • 44 mA @ 14 dBm (energy-saving mode)

dBm: (Decibel-Milliwatts) Measures the power level of a signal

  • -30 dBm = very strong signal

  • -70 dBm = good/average signal

  • -100 dBm = very weak signal

mA: (Milliamps) How much power the device is currently drawing

  • The higher the dBm (signal) the more power will be drawn (mA)

Reference Point: 0 dBm = 1mW 

  • The scale is logarithmic: +10dBm =  10 mW & +20dBm = 100mW

Supported Frequency Bands (Region-Dependent)

  • United States: US915 (902–928 MHz)

  • European Union: EU868 (863–870 MHz)

  • China: CN470 (470–510 MHz)

  • Asia-Pacific: AS923 (915–928 MHz)

  • Australia: AU915 (915–928 MHz)

  • Korea: KR920 (920–923 MHz)

🧱 Physical Characteristics

Dimensions

  • Sensor Unit: 94 × 44 × 27 mm

  • External Cable: Ø 4 mm, Length: 2 m

  • External Probe: Ø 5.8 mm, Length: 50 mm

Ingress Protection Ratings

  • Logger Unit: IP65

    • Dust-tight; protected from low-pressure water jets (splash-resistant)

  • External Probe: IP69

    • Fully dust-tight; withstands high-pressure, high-temperature water jets


📍 Primary Use Cases

🍽️ Food Safety Monitoring

Ensure compliance and quality with continuous temperature and humidity logging of food service equipment such as refrigerators, freezers, and hot-holding units.
PathSpot™ offers a centralized visualization dashboard that displays all monitored equipment at a glance. Color-coded status cards make it easy to see whether readings fall within your user-defined thresholds, helping your team act quickly when conditions drift out of range.

🌡️ Ambient Environment Monitoring

Monitor temperature and humidity in workspaces, food preparation areas, and storage environments. Continuous environmental data provides insights into:

  • Employee comfort

  • Food safety readiness

  • Compliance with health standards

Whether ensuring optimal prep conditions or maintaining a safe, comfortable workspace, PathSpot™ delivers real-time awareness and historical trends to support operational excellence.

🔋 Battery Power Consumption Chart

Sensor Setup Idle Consumption<br>(µA) Max Transmitting Current<br>(mA) Transmission Frequency Estimated Battery Life
Logger LHT65 (No External Probe) 3 µA 130 mA Every 20 minutes ~8 years
Logger LHT65 (No External Probe) 3 µA 130 mA Every 10 minutes ~5 years
Logger LHT65 + Temp Probe 4 µA 130 mA Every 20 minutes ~5 years
Logger LHT65 + Temp Probe 4 µA 130 mA Every 10 minutes ~3 years

*1 mA (milliampere) = 1,000 µA (microamperes)

⚠️ Important Notes & Disclaimers

  • 🔥 Temperature Safety Warning:
    The logger must not be exposed to temperatures exceeding 100 °C, as this may result in fire or explosion.
    Prolonged exposure to temperatures above 60 °C significantly reduces battery lifespan.

  • 🔋 Battery Life Variability:
    Battery performance depends heavily on environmental conditions and configuration.
    Under typical settings (default transmit power, external probe connected, 20-minute ping rate), the average battery life is approximately 3 years.

  • 🌐 Frequency Band Availability:
    PathSpot™ currently supports the following LoRaWAN™ frequency bands:

    • US915

    • EU868

    • CN470
      Additional regional frequencies may be available upon request. Contact PathSpot™ support for custom configurations.