ALTA® Wi-Fi Wireless Temperature Sensor – Accurate, Waterproof Monitoring

The ALTA® Wireless Temperature Sensor offers reliable, high-accuracy temperature measurement using a waterproof thermistor probe. Available in leaded and non-leaded options, it’s ideal for monitoring air, liquids, or surfaces in harsh or regulated environments.

This Wi-Fi-enabled model connects directly to your local network for seamless cloud monitoring via the iMonnit® platform. It's designed for fast setup and dependable performance, with configurable thresholds to trigger alerts in real-time.

Note: Initial setup requires a Monnit programming cable to configure the sensor to your internal router.

Key Features:

• Measurement Range:

  • Leaded: -40°C to 125°C (-40°F to 257°F)

  • Non-leaded: Based on enclosure/battery limitations

• Resolution: 0.1°C (0.18°F)

• Standard Accuracy: ±1°C (±1.8°F)

• Calibrated Accuracy: ±0.25°C (±0.45°F)

• Waterproof, durable probe for long-term monitoring

• Configurable alerts and thresholds via iMonnit®

• Compatible with iMonnit® Basic or Premiere accounts

Category	Specification

Temperature Measurement

Range (Leaded Sensor)

-40°C to +125°C (-40°F to +257°F), Waterproof

Range (Non-Leaded Sensor)

Limited to operational range of sensor body: -7°C to +60°C (+20°F to +140°F)

Accuracy @ 25°C

±1°C (1.8°F)

User-Calibrated Accuracy

±0.5°C (0.9°F)

Resolution

0.1°C (0.18°F)

Response Time

50 seconds (10-second time constant)

Leaded Probe

Transducer Type

10 KOhm NTC Thermistor (β = 3455 K)

Tip Dimension

4.00 mm (0.157") diameter by 30 mm (1.18")

Tip Material

Type 304 stainless steel

Cable Material

Waterproof high-temperature ABS with EMF shielding

Cable Diameter

3.56 mm (0.14")

Cable Length

Standard: 0.9 m (3'); Optional: 1.5 m (5'), 3 m (10'), 7.5 m (25'), 15 m (50'), 30 m (100')

Wi-Fi

Wireless Protocol

802.11 b

Wireless Range

125 feet through five walls or 500 feet line of sight

Frequency Band

2.412 - 2.484 GHz

Security

Wi-Fi: Open, WPA, WPA2, WPA3

Provisioning

Over Bluetooth via Monnit-provided application

Network Settings

Auto DHCP/DNS or Static

Data Rate

Auto configures to best rate for maximum range

Data Logging

Logging Capacity

4000 to 4096 readings if Wi-Fi connection is lost (non-volatile flash persists through power cycles):

- 10-minute Heartbeats: ~22 days

- 2-hour Heartbeats: ~266 days

Additional Data Security

Advanced Encryption Standard (AES)-128 Cipher Block Chaining (CBC) for sensor data messages

LED	RGB (Indicates status and activity)

Power/Utility Button

Tactile (powers device on/off, triggers data transmission, changes operating mode, etc.)

General

Battery Voltage Range

2.0 to 3.3 VDC

Operating Altitude

-15.2 to 1,982 m (-50 to 6,500 ft)

Storage Altitude

-15.2 to 3,048 m (-50 to 10,000 ft)

Operating Humidity

5% to 85% RH (non-condensing)

Operating Temperature (Board Circuitry)

-18°C to +55°C (-0.4°F to +131°F)

Optimal Battery Temperature (AA)

+10°C to +50°C (+50°F to +122°F)

Weight

82 g (2.90 oz)

Certifications

Certifications

FCC ID: 2AC7Z-ESPC3MINII, IC: 21098-ESPC3MINI1

Please See the Below: 

Data Sheet

 

Example Applications:

• Ambient temperature monitoring
• Research refrigeration monitoring
• Food and restaurant refrigeration monitoring
• Environmental monitoring
• Smart machines and facilities
• HVAC operation and testing
• Data center monitoring
• More

See below: 

WIFI Programming USB