UWTC

Supported Applications

The Omega UW Series (including UWTC and UWRTD models) comprises compact, battery-powered wireless transmitters designed for stand-alone temperature monitoring. These devices transmit readings from thermocouple or RTD sensors to a host receiver up to 120 m (400 ft) away in outdoor line-of-sight conditions, with indoor/urban ranges reaching up to 45 m (130 ft). The system is intended for dry, moisture-free indoor applications only. Included software converts a PC into a multi-channel chart recorder or data logger.

Explicitly documented constraints include:

• Prohibited Environments: Do not operate in flammable or explosive environments; do not use for medical or nuclear applications.
• Installation Restrictions: Designed for permanent installation only, not as a portable device. No co-location with other radio transmitters is allowed within 20 cm. Units must be installed at least 20 cm apart and kept more than 20 cm from nearby persons during operation.

Operating Conditions & Performance

The UW Series supports a wide envelope of temperature measurement ranges depending on the selected sensor type, with an ambient operating environment specified as -10 °C to 70 °C (14 °F to 158 °F). The device features automatic cold junction compensation within this same range.

Measurement accuracy varies by input type:

• Type J and K Thermocouples: ±0.5 % rdg or ±1.0 °C (1.8 °F), whichever is greater
• Types T, E, and N Thermocouples: ±0.5 % rdg or ±2.0 °C (3.6 °F), whichever is greater
• Types R, S, B, and C Thermocouples: ±0.5 % FS
• Pt100 RTD: ±0.5 °C (1.0 °F)

The system provides a resolution of 1 °C/1 °F and transmits data via ISM 2.4 GHz direct sequence spread spectrum radio frequency (RF) using the IEEE 802.15.4 standard. The RF output power for UWTC-2 and UWRTD-2 models is 10 dBm (10 mW). Data packets include thermocouple reading, connector ambient reading, RF transmit strength, and battery condition.

Measurement Ranges by Sensor Type

• Type J: -100 °C to 760 °C (-148 °F to 1400 °F)
• Type K: -100 °C to 1260 °C (-148 °F to 2300 °F)
• Type T: -200 °C to 400 °C (-328 °F to 752 °F)
• Type E: -200 °C to 1000 °C (-328 °F to 1832 °F)
• Type R and S: 260 °C to 1760 °C (500 °F to 3200 °F)
• Type B: 870 °C to 1820 °C (1598 °F to 3308 °F)
• Type C: 0 °C to 2315 °C (32 °F to 4200 °F)
• Type N: -100 °C to 1260 °C (-148 °F to 2300 °F)
• Pt100 (0.00385 curve): -200 °C to 850 °C (-328 °F to 1562 °F)
• Pt100 (0.00392 curve): -100 °C to 457 °C (-148 °F to 854 °F)

Configuration Options

The series offers configurable options for sensor input, housing style, and power configuration. The standard UWTC-2 and UWRTD-2 models utilize a universal female connector accepting both standard male (OSTW Series) or miniature male (SMPW Series) mating connectors for thermocouples, while the RTD version uses a Series "T" receptacle (type TA4M) with an included TA4F mating connector.

Power is supplied by one 3.6 V lithium battery with 2.4 Ah capacity (AA size), providing typical life of 1 year at a sample rate of 1 sample/minute @ 25 °C (77 °F). Alternative power configurations include Standard C 3.6V Lithium Battery Assembly for -NB9 or -NEMA versions, and external USB power is available.

Key configurable dimensions across the series envelope:

• Housing Materials: ABS plastic (standard); NEMA-rated enclosure options are offered (-NEMA suffix).
• Sensor Inputs: Software selectable for Thermocouple types J, K, T, E, R, S, B, C, or N; RTD 100 Ω Pt with 0.00385 or 0.00392 curves.
• Output Signals: Wireless transmission to receiver (UWTC-REC1/REC2/REC4); analog voltage, current, or thermocouple signal via wired connection when used with UWTC-REC2.
• Approvals: FCC Compliant (All Models), Industry Canada, SRRC Approved. UWTC models are CE compliant; UWRTD models are not CE compliant.

Included Accessories and Options

• Sensors: Type-K Thermocouple Sensor (Omega No. SC-GG-K-30-36) included with UWTC-2; TA4F Mating Connector included with UWRTD-2.
• Mounting: Mounting Bracket Kit included.
• Batteries: Standard (AA) 3.6V Lithium Battery (Omega No. UWTC-BATT); Standard (C) 3.6V Lithium Battery Assembly (Omega No. UWTC-BATT-C).
• Receivers & Antennas: UWTC-REC1 (48-channel receiver/host), optional high-performance antenna (UWTC-ANT-LR).

Key Product Differences

The series distinguishes between thermocouple and RTD input families, as well as specific housing configurations:

• UWTC Series: Thermocouple-to-wireless connector/converter. Models include UWTC-1, UWTC-2 (extended distance 120 m / 400 ft), and UWTC-NB9.
• UWRTD Series: RTD-to-wireless connector/converter. Models include UWRTD-1, UWRTD-2 (extended distance 120 m / 400 ft), and UWRTD-NB9.
• NEMA Versions: Specific models such as UWTC-2-NEMA and UWRTD-2-NEMA feature a NEMA-rated enclosure, though the specific rating is not stated in the documentation. These versions utilize Standard C 3.6V Lithium Battery Assembly power sources.

Physical dimensions for standard models are 100 mm L x 50 mm W x 25 mm H (4 in x 2 in x 1 in) without antenna, with a weight of 70 g. The device case is constructed from ABS plastic.