OTC Transmitters


Battery-Powered Self-Contained Wireless Monitoring Solution



  • Helps monitor the integrity of a CP system
  • DC current input: 100 Amp
  • Voltage input: 0-50 Voltage DC input for monitoring cathodic rectifier DC Voltage output
  • Includes a DC current sensor
  • Up to a 10-year battery life
  • Self-contained, rugged design
  • Installs in minutes
  • IP66, -40 °C to 85 °C
  • 900 MHz range: Up to 1.4 Miles / 2.3 km with Clear Line of Sight
  • Secure AES encryption

Around-the-Clock Protection

The OleumTech® CP1 Cathodic Protection Transmitter Kit is designed to help monitor the integrity of a cathodic protection system by monitoring both current and voltage. The CP1 Transmitter provides its users the flexibility of selecting the Current Range: 0-20, 0-40, or 0-80 Amp. It also provides 0-50 Voltage DC input for monitoring cathodic rectifier DC Voltage output. The CP1 features high resolution 24-bit analog to digital conversion (ADC). The kit includes a DC Current Sensor. This ultra-low-power transmitter is powered by a replaceable battery pack that provides 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.


Radio Band∙ ISM Band (License-Free)
900 MHz∙ FHSS, FSK, AES Encryption 256-bit (900 MHz)
Bit Rate∙ 900 MHz: 9600 bps / 115.2 kbps
Output Power (Max)∙ 900 MHz: 10 mW
Receiving Sensitivity∙ 900 MHz: -110 dBm @ 9600 bps, -100 dBm @ 115.2 kbps
RF Range∙ 900 MHz: Up to 7500 Feet / 1.4 Miles / 2.3 km with Clear Line of Sight
Device Functionality∙ Wirelessly Monitors Integrity of Cathodic Protection System
Embedded Controller∙ Ultra-Low Power RISC Microcontroller with Internal FLASH (Field Upgradeable)
Configuration∙ Standard RS232 Serial / BreeZ® Software for PC
DC Current Input∙ 0-100 Amp Range
Voltage Input∙ 0-50 Vdc Input for Rectifier Output
Power Source∙ Transmitter: Self-Contained, Internal 3.6 Vdc Lithium Battery
∙ DC Current Sensor: 12 Vdc Supplied by Transmitter
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
Dimensions∙ 5" (W) x 12.6" (H) x 4.4" (D) / 127 mm (W) x 320 mm (H) x 112 mm (D)
DC Current Sensor Dimensions∙ 3" (W) x 3.5" (H) x 1.3" (D) / 76 mm (W) x 89 mm (H) x 33 mm (D)
Package Dimensions∙ 10.25" (W) x 14" (H) x 6.5" (D) / 260 mm (W) x 356 mm (H) x 165 mm (D)
Package Weight∙ ~7 lbs / 3.2 kg
Connection Fitting∙ 3x 3/4" NPT Female Ports (2x Plugged)
Enclosure Casing Material∙ Type 4X Aluminum; IP66
EMC/EMI∙ FCC Part 15 (USA), IC ICES-003 (Canada)
Safety∙ CAN/CSA-C22.2 No. 61010-1-2012
∙ UL Std. No. 61010-1-2012
∙ IEC/EN 61010-1-2010
∙ Device is not intended for use in hazardous locations
Operating Conditions∙ 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-CP1; 2.4 GHz: SM5400-CP1; Kit Includes DC Current Sensor
Wirelessly Connects To∙ OTC Wireless Gateway
Configuration Cable∙ SX1000-CC2, 20-ft All-in-One Configuration Cable
Replacement Battery∙ Use OleumTech SX1000-BP2 Only