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OTC Transmitters


Battery-Powered Self-Contained Temperature Monitoring Solution



  • “RTD” includes a 2” to 18” RTD sensor
  • “RTM” supports 2, 3, or 4-wire RTD sensors
  • High accuracy of ±0.06% @ 0 °C (”RTD”)
  • Up to a 10-year battery life
  • Self-contained, rugged design
  • Installs in minutes
  • Class I, Division 1 (Zone 0)
  • Intrinsically Safe
  • IP66, -40 °C to 70 °C
  • 900 / 2.4 GHz / 868 MHz
  • Secure AES encryption

Works with a 2, 3, or 4-Wire RTD Sensor

The OleumTech® RTD and RTM Temperature Transmitters are ideal for monitoring air, gas, water, or liquid temperatures. The RTM direct mount version is available with a 4-wire Platinum 100 ohm Class A RTD sensor with a high accuracy of ±0.06% @ 0 °C. Users can choose from 2 to 18-inch RTD length. It supports temperatures ranging from -67 °F to 500 °F (-55 °C to 260 °C). The RTM multi-vendor version provides a junction box and wiring terminal board for accepting a third-party 2, 3, or 4-wire RTD sensors. The temperature output can be reported in Fahrenheit, Celsius, or both. These ultra-low-powered transmitters are powered by replaceable battery packs that provide up to a 10-year life.

Reliable, Scalable and Safe

The field-proven wireless sensor node communicates with an assigned wireless gateway within the OTC Wireless Sensor and I/O Network creating a highly scalable network, accommodating virtually any I/O requirement. The OleumTech Wireless Transmitter is certified for use in Class I, Division 1 (Zone 0) hazardous locations. It is intrinsically safe, designed not to cause a spark, and can be serviced without being removed from a process.

This product is also available with a local display.


∙ ISM Band, Spread Spectrum
Type: 900 MHz / 915 MHz∙ 900 MHz: FHSS (Frequency Hopping), FSK, AES Encryption 256-bit (900 MHz), 128-bit (915 MHz)
2.4 GHz∙ 2.4 GHz: DSSS (Direct-Sequence), AES Encryption 128-bit
868 MHz∙ 868 MHz: LBT (Listen Before Talk), AFA (Adaptive Frequency Agility), AES Encryption 128-bit
Bit Rate∙ 900 MHz: 9600 bps / 115.2 kbps; 2.4 GHz: 250 kbps; 868 MHz: 80 kpbs
Output Power (Max)∙ 900 MHz: 10 mW; 2.4 GHz: 63 mW; 868 MHz: 25mW
Receiving Sensitivity∙ 900 MHz: -110 dBm @ 9600 bps, -100 dBm @ 115.2 kbps
∙ 2.4 GHz: -100 dBm @ 250 kbps; 868 MHz: -101 dBm @ 80 kbps
RF Range∙ 900 MHz: Up to 7500 Feet (2.3 km) with Clear Line of Sight
∙ 2.4 GHz: Up to 5.7 Miles / 9.2 km with Clear Line of Sight
∙ 868 MHz: Up to 5.2 Miles / 8.4 km with Clear Line of Sight
Device Functionality∙ Temperature Sensing Wireless Transmitter Using RTD Sensor
Embedded Controller∙ Ultra-Low Power RISC Microcontroller with Internal FLASH (Field Upgradeable)
Configuration∙ Standard RS232 Serial / BreeZ® Software for PC
ADC Resolution∙ 22-bit High-Resolution Delta-Sigma ADC
Power Source∙ Self-Contained, Internal 3.6 Vdc Lithium Battery
Internal Battery Life∙ Over 10 Years, Based on User Defined Reporting Intervals
Device Diagnostics∙ Health Tags: Battery Voltage, Received Signal Strength Indication (RSSI), RF Refresh, RF Timeout, Error Codes
Dimensions, RTD∙ 5" (W) x 7.6" (H) x 4.4" (D) / 127 mm (W) x 193 mm (H) x 112 mm (D) - Excludes RTD Length
Dimensions, RTM∙ 5" (W) x 12.3" (H) x 6.4" (D) / 127 mm (W) x 313 mm (H) x 163 mm (D) - Excludes RTD Length
Package Dimensions ∙ 10.25" (W) x 14" (H) x 6.5" (D) / 260mm (W) x 356mm (H) x 165mm (D)
Package Weight, RTD∙ ~5.25 lbs / 2.4 kg
Package Weight, RTM∙ ~7 lbs / 3.2 kg
Connection Fitting∙ RTD: 1/2" NPT Male; RTM: 3/4" NPT Female
Enclosure Casing Material∙ Type 4X Aluminum; IP66
EMC/EMI∙ FCC Part 15 (USA), IC ICES-003 (Canada), ACMA (Australia)
Safety∙ Class I, Division 1, Groups A, B, C, D T3C; Ex ia IIC T3
∙ Class I, Zone 0; AEx ia IIC T3
∙ ATEX: Sira 13ATEX2142X; Ex ia IIC T3 Ga; II 1 G
∙ IECEx: SIR 13.0054X; Ex ia IIC T3 Ga
Operating Conditions∙ Ambient Temperature (Class I, Division 1/ Zone 0): -40 °F to 158 °F (-40 °C to 70 °C)
∙ Ambient Temperature (Non-Hazardous Applications): -40 °F to 176 °F (-40 °C to 80 °C)
∙ Humidity: 0 to 99 %, Non-Condensing
Warranty∙ 2-Year Parts and Labor
Country of Origin∙ USA
Model Numbers∙ 900 MHz: SM5000-RTD (Direct-Mount) / SM5000-RTM (Multi-Vendor)
∙ 2.4 GHz: SM5400-RTD (Direct-Mount) / SM5400-RTM (Multi-Vendor)
Wirelessly Connects To∙ OTC Wireless Gateway
Configuration Cable∙ SX1000-CC2, 20-ft All-in-One Configuration Cable
Replacement Battery∙ Use OleumTech SX1000-BP3 Only