WIRELESS RTD SENSOR TRANSMITTER
Battery-Powered, Self-Contained Temperature Monitoring Solution


SM-RTD | SM-RTM
HIGHLIGHTS
- SM-RTD is available with a 2” to 18” RTD sensor
- SM-RTM supports third-party RTD sensors
- High accuracy of ±0.15 °C / ±0.06% @ 0 °C (SM-RTD)
- Up to a 10-year battery life
- Supports Over-the-Air (OTA) functionality for updating the device configuration (900 MHz only)
- Self-contained, rugged design
- Installs in minutes
- IP66, -40 ˚C to 70 ˚C (-40 ˚F to 158 ˚F)
- 900/915 MHz range: Up to 1.4 Miles / 2.3 km with Clear Line of Sight
- 2.4 GHz range: Up to 1.9 Miles / 3.1 km with Clear Line of Sight
- 868 MHz range: Up to 1.5 Miles / 2.4 km with Clear Line of Sight
- Secure AES encryption
- Class I, Division 1 (Zone 0)
- Intrinsically Safe


Supports 2, 3, or 4-Wire RTD Sensor
The OleumTech® OTC Wireless RTD Temperature Transmitters are ideal for monitoring air, gas, water, or liquid temperatures. The SM-RTD direct mount version is available with a 4-wire Platinum 100 ohm Class A RTD sensor with a high accuracy of ±0.15 °C / ±0.06% @ 0 °C. You can choose from 2 to 18-inch RTD length. It supports temperatures ranging from -55 °C to 260 °C. The SM-RTM multivendor 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.
TECHNICAL SPECIFICATIONS
WIRELESS COMMUNICATIONS | |
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Radio Band | ∙ ISM Band (License-Free) |
900 MHz / 915 MHz | ∙ FHSS, FSK, AES Encryption 256-bit (900 MHz), 128-bit (915 MHz) |
2.4 GHz | ∙ DSSS, AES Encryption 128-bit |
868 MHz | ∙ LBT-AFA, AES Encryption 128-bit |
Bit Rate | ∙ 900/915 MHz: 9600 bps / 115.2 kbps; 2.4 GHz: 250 kbps; 868 MHz: 80 kpbs |
Output Power (Max) | ∙ 900/915 MHz: 10 mW; 2.4 GHz: 63 mW; 868 MHz: 25mW |
Receiving Sensitivity | ∙ 900/915 MHz: -110 dBm @ 9600 bps, -100 dBm @ 115.2 kbps |
∙ 2.4 GHz: -101 dBm @ 250 kbps; 868 MHz: -106 dBm @ 80 kbps | |
RF Range | ∙ 900/915 MHz: Up to 7500 Feet / 1.4 Miles / 2.3 km with Clear Line of Sight |
∙ 2.4 GHz: Up to 1.9 Miles / 3.1 km with Clear Line of Sight | |
∙ 868 MHz: Up to 1.5 Miles / 2.4 km with Clear Line of Sight |
RTD TEMPERATURE SENSOR | |
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RTD Element | ∙ Platinum 100 Ohm, Class A (Model SM-RTD) |
Temperature Coefficient | ∙ 0.00385 (Model SM-RTD) |
Probe Lengths | ∙ 2" to 18" / 30.5 to 45.5 cm in 1" / 25 mm Increments |
Temperature Range | ∙ SM-RTD: -67 °F to 500 °F (-55 °C to 260 °C); SM-RTM: Temperature Range Depends on Sensor |
Accuracy | ∙ SM-RTD: ±0.15 °C / ±0.06% @ 0 °C; SM-RTM: Accuracy Depends on Sensor |
Materials | ∙ Probe Cover - Silver Coated Copper / Probe Insulation - PTFE |
HARDWARE FEATURES | |
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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 | ∙ 24-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 |
CERTIFICATIONS & COMPLIANCE | |
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EMC/EMI | ∙ FCC Part 15 (USA), IC ICES-003 (Canada), ACMA (Australia) |
∙ AS/NZS CISPR 32 (Australia), EN55032 & EN55024 (EU) | |
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 |
GENERAL SPECIFICATIONS | |
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Operating Conditions | ∙ Ambient Temperature (Class I, Division 1 / Zone 0): -40 °C to 70 °C (-40 °F to 158 °F) |
∙ Ambient Temperature (Non-Hazardous Applications): -40 °C to 80 °C (-40 °F to 176 °F) | |
∙ Humidity: 0 to 99 %, Non-Condensing | |
Warranty | ∙ 2-Year Parts and Labor |
Country of Origin | ∙ USA |
ORDERING INFORMATION | |
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Model Numbers | ∙ Direct Mount: SM5000-RTD (900), SM5010-RTD (915), SM5400-RTD (2.4), SM5020-RTD (868) |
∙ Multi-Vendor: SM5000-RTM (900), SM5010-RTM (915), SM5400-RTM (2.4), SM5020-RTM (868) | |
Wirelessly Connects To | ∙ OTC Wireless Gateway |
Configuration Cable | ∙ SX1000-CC2, 20-ft All-in-One Configuration Cable |
Replacement Battery | ∙ Use OleumTech SX1000-BP3 Only |
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