MNS2-9-W2-LS-LM Monnit Alta Wireless Light Level Meters

Supported Applications

The Omega Alta Wireless Light Meter series measures light intensity and detects the presence or absence of light. The product overview identifies suitability for light-sensitive applications including museums, art galleries, and industrial environments.

Operating Conditions & Performance

The series utilizes a highly sensitive photodiode to measure light levels from 0–83,000 LUX with an accuracy of 0.5% of reading. Data is transmitted wirelessly via Encrypt-RF® (256-bit key exchange and AES-128 CTR) security protocols.

Operating temperature ranges vary by model configuration:

• Commercial AA Wireless Light Meter: -18°C to 55°C (0°F to 130°F) using alkaline batteries; -40°C to 85°C (-40°F to 185°F) using lithium batteries.
• Industrial Wireless Light Meter: -40°C to +85°C (-40°F to +185°F).

The Commercial AA model includes an optimal battery temperature range of +10°C to +50°C (+50°F to +122°F). Wireless transmission supports a range of 1,200+ ft non-line-of-sight.

Power and Electrical Specifications

The series operates on a supply voltage of 2.0–3.8 VDC (3.0–3.8 VDC using power supply). Current consumption varies by mode: 0.2 μA (sleep), 0.7 μA (RTC sleep), 570 μA (MCU idle), 2.5 mA (MCU active), 5.5 mA (radio RX), and 22.6 mA (radio TX). The Industrial model includes a battery with 1500 mAh capacity.

Approvals and Certifications

Certifications include FCC, CE, and Industry Canada. Specific identifiers are:

• 900 MHz product: FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1.
• 433 MHz product: Tested to comply with EN 300 220-2 V3.1.1 (2017-02) and EN 60950.

The Industrial model is UL Listed to UL508-4x specifications (File E194432).

Configuration Options

The series offers two primary configurations with distinct physical and environmental characteristics:

• Commercial AA Wireless Light Meter: Features a black plastic housing. Dimensions are 4.375 in width, 2.470 in height, and 3.295 in depth; weight is 3.7 ounces.
• Industrial Wireless Light Meter: Features clear plastic with a gray base. It carries an enclosure rating of NEMA 1, 2, 4, 4x, 12 and 13 rated, sealed and weatherproof. Dimensions are 3.701 in width, 1.378 in height, and 2.316 in depth; weight is 4.8 ounces.

Power options include two replaceable 1.5 V AA batteries for the standard version or a line-powered option with backup AA batteries utilizing a barrel power connector. The series supports integrated memory of up to 3200 sensor messages and includes access to the free iMonnit basic online wireless sensor monitoring and notification system.

Key Product Differences

The Commercial AA model is intended for general use, while warnings specify not to use commercial grade sensors in corrosive, flammable, dusty, high-pressure, wet, or vibrating environments. The Industrial model provides the NEMA 1, 2, 4, 4x, 12 and 13 rated enclosure suitable for harsher conditions.

Both models share identical measurement ranges (0–83,000 LUX), accuracy (0.5% of reading), wireless security protocols, and supply voltage requirements. The primary distinctions lie in the operating temperature envelope when using alkaline batteries, physical dimensions, weight, housing material, and environmental ratings.