by The Leading Enterprise Internet of Things Solution Wireless Water Temperature Sensors General Description Features of Monnit ALTA Sensors The ALTA Wireless Water Temperature Sensor uses Wireless range of 1,200+ feet through 12+ walls * a sealed, type NTC thermistor with 3 ft lead wires to Frequency-Hopping Spread Spectrum (FHSS) measure water temperature. Improved interference immunity Improved power management for longer battery life ** Accurate to 1 C ( 1.8 F) (12+ years on AA batteries) Increased accuracy by user calibration Encrypt-RF Security (Diffie-Hellman Key Exchange to 0.25 C ( 0.45 F) + AES-128 CBC for sensor data messages) Probe temperature range of -40C to +100C All ALTA sensors now have up to 3200 readings: (-40F to +212F) - 10-minute heartbeats = 22 days Sealed, 3 ft leaded wires - 2-hour heartbeats = 266 days Over-the-air updates (future proof) Free iMonnit basic online wireless sensor monitoring and notification system to configure sensors, view Principle of Operation data and set alerts via SMS text and email The ALTA Wireless Water Temperature Sensor can collect temperature data of water or other non- Actual range may vary depending on environment. * combustible liquids using a sealed NTC thermistor Battery life is determined by sensor reporting ** with 3 foot lead wires. The sensor is programmed to frequency and other variables. Other power options sleep for a user defined time interval (heartbeat) and are also available. then wakeup, send power to the NTC Thermistor and wait for it to stabilize, and convert the analog data, mathematically compute the temperature and transmit Wireless Range Comparison Wireless Range Comparison the data to the gateway. To stay within the abilities of the processor, the temperature is computed off a data table provided by the manufacturer. To reduce error, Monnit ALTA a variable resistor configuration is implemented over specified temperature ranges. Temperature data can be displayed in degrees Fahrenheit or Celsius. Monnit Industry leading 25 month NIST certified product included on leaded temperature sensors. Other Wireless Platforms Example Applications Water/liquid storage tanks Wifi Manufacturing processes Swimming pools Aquariums Bluetooth PAGE 11.125 in Pinch and Pull (28.575 mm) To Change Battery 2.0 in (50.8 mm) CR2032 BATTERY 0.875 in (22.225 mm) ALTA Commercial Coin Cell Wireless Water Temperature Sensor Technical Specifications Supply voltage 2.03.8 VDC * Current consumption 0.2 A (sleep mode), 0.7 A (RTC sleep), 570 A (MCU idle), 2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio TX mode) Operating temperature range (board circuitry and coin cell) -7C to +60C (20F to +140F) Optimal battery temperature range (coin cell) +10C to +50C (+50F to +122F) Probe Temperature Range -40C to +100C (-40F to +212F) Accuracy 25C +/- 1% User-calibrated accuracy +/- 0.25 C ( 0.45 F) Time constant 25C 30 sec Lead wire length 3 ft (36 in) with Water Tight Seal ** Integrated memory Up to 3200 sensor messages Wireless range 1,200+ ft non-line-of-sight Security Encrypt-RF (256-bit key exchange and AES-128 CTR) Weight 0.7 ounces Certifications 900 MHz product FCC ID: ZTL-G2SC1 and IC: 9794A- Industry G2SC1. 868 and 433 MHz product tested and found to Canada comply with: EN 300 220-2 V3.1.1 (2017-02), EN 300 220-2 V3.1.1 (2017-02) and EN 60950 Hardware cannot withstand negative voltage. Please take care when connecting a power device. * ** While the wire leads and thermistor have a water tight seal, the electronics housing (RF portion) is not sealed for wet environments or outdoor use. If needed, we recommend using Monnit industrial water temperature sensors. PinchPower Enclosures CR2032 BATTERY CR2032 BATTERY + Pinch Pull Press (sensor away from base) (sensor back into base) (press in on the sides) PAGE 2