Radar & Pressure Dual Sensor

TRUE ECHO® Plus

DESCRIPTION
Features

Twice the Tech For Once Smart Solution

The TRUE ECHO® Plus combines the accurate level readings of the CR-L radar with the precision pressure measurement from a submersible pressure transducer. Together they form a versatile dual sensor that is uniquely engineered for detecting and measuring overfill or flood conditions so you don’t have to operate in the dark when systems overflow.

With a maximum measuring range of 49.2 feet (15 m) and a minimum blind zone of just 7.87 inches (0.2 m), it’s ideal for applications where space is limited and precision is non-negotiable. Setup and adjustments are a breeze using the intuitive TRUE ECHO App via Bluetooth.

When levels rise and the radar is submerged, the integrated submersible pressure transducer takes over—ensuring continuous, reliable monitoring through every condition. Built with rugged, heavy-duty wetted materials, the TRUE ECHO Plus is engineered to perform in the toughest environments.

From flood alerts to overfill prevention, TRUE ECHO Plus keeps you ahead of the curve.

Enhanced Accuracy & Redundancy: Dual radar technology for improved performance
Versatile for Many Industries: Suitable for a wide range of applications
Easy Drainage, Less Maintenance: Self-draining design reduces cleanup
Reliable in Overfill Conditions: Continuous level measurement even during overfill
Effortless Connectivity: Single cable RS-485 Modbus output

Description
Reviews (0)

User Manual

Software Download

Certification Doc

Radar Performance

Range: 7.87 in. to 49.21 ft. (0.2 to 15 m)
Measuring Frequency: W Band, 76 to 81GHz, 5GHz FMCW bandwidth
Update Rate: 1.25Hz
Power on to 1st Reading: 7 seconds (minimum)*
Accuracy: ± 3mm
Beam Angle: 8º (4º half angle)

Pressure Performance

Accuracy (linearity, hysteresis, and repeatability): ±0.25% of span (BFSL) (1% for ≤ 1 psi)
Pressure Range: 0 to 30 psia
Non-measurable Zone: ~ 13.43 inch (0.34 m)
1 Year Stability: 0.75% FSO
Temp Effects on Zero & Span: ≤ 0.025% FS/°F @ 70°

Environmental

Standard Compensated Temp.:
- ≤ 10 psi: 0° to 60°C / 32° to 140°F
- < 10 psi: -10° to 70°C / 14° to 158°F
Storage Temp: -40° to 82°C / -40° to 180°F
Operating Temp: -40º to 85ºC / -40º to 185ºF
Protection Rating: IP68 (1 m for 8 hours)
Dielectric Constant of Measured Medium: ≥ 2

Electrical

Operating Voltage: 12–28 VDC (5-17 mA RMS @ 24 VDC)
Reverse Voltage Protection: ≤30V
Spike Protection: <3kW
Cable: Polyurethane jacket with shielded 18awg wires

Connectivity

Output Signal: Modbus/RTU (RS-485) 4 wire + shield
Bluetooth Compatible Version (Radar): 5

Physical

Weight: ~900g
Wetted Materials:
- Cable Jacket: Polyurethane
- Cable Gland: Nylon
- Pressure Sensor: 316SS
- Case: PBT + PC Resin Blend, POMH Plastic
- Radar Body: PE or PDVF
- Stabilizer: 316SS

Certifications

FCC
ISED
CE

1. What is the measuring range of the TRUE ECHO® CR-L?

The TRUE ECHO® CR-L has a measuring range from 7.87 inches (0.2 meters) to 49.2 feet (15 meters), providing accurate liquid level measurements across a variety of applications.

2. How accurate is the TRUE ECHO® CR-L sensor?

This radar liquid level sensor offers a high accuracy of ±3mm, ensuring precise and reliable readings.

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WARRANTY

APG warrants its products to be free from defects in material and workmanship under normal use and service of the product for 24 months from the date of shipment from APG, unless otherwise specified by APG in writing. Read our full warranty policy HERE.

RETURNS

Returns and allowances must be authorized by APG in advance, which authorization may be granted or withheld by APG in APG’s sole and absolute discretion. Read our full return policy HERE.

Radar & Pressure Dual Sensor