Legacy Digital Indicator: DERELL REI-37-E-220 (discontinued model)

This model was part of DERELL's economical indicator line, powered by 220V AC. A 24V AC/DC version was also available during its production run. The panel dimensions are 37x72 mm. See product visuals for cut-out details.

⚠️ This model is no longer in production. It is only available for spare part replacement purposes. For new designs and applications, we recommend browsing similar models below.

Supported Input Types:
• (0-10V) >> Standard voltage input used typically for inverter analog outputs. Can be directly connected to inverter potentiometers.
• (0-1V) >> For humidity or load-cell-like signal sensing (⚠️ Load-cells require external amplifier).
• (0-20mA) >> Inverter and sensor analog output compatibility.
• (4-20mA) >> Industrial current sensing supported.

This unit allows basic calibration and display scaling via front panel. Decimal point can be adjusted. There are no relay outputs, it’s a display-only device. However, options such as memory of min/max values and customized displays were possible in the series.

Optional Series Capabilities (not applicable to this unit):
- 0-10V calibrated analog output
- RS485 Modbus communication
- Programmable relay outputs
- Internal 12/24V sensor power output
- Dual input mode
- USB memory data logging
- LCD version with bar/rpm labels

Recommended Alternatives:
- DEIP-37-R-A (with power output)
- DGI-44-R-A (with relay outputs & dual display)
- DEIP-77-R-A (larger version)

Note: This unit does not provide sensor power. If you require +VDC for a pressure sensor or potentiometer, please consider the DEIP series or use an external power supply.

++ The REI-37-E-220 was designed for basic applications. However, this legacy model lacked mechanical and display robustness. In contrast, the newer DEIP and DGI series devices feature more ergonomic buttons, improved mechanical build, and 4-digit high-resolution displays.

Editor's Note: The REI series is discontinued. For stable and modern design requirements, explore the DEIP and DGI families. Newer models eliminate display flickering and provide durable front panels and housing.

⚠️ Important: Installation of DERELL REI series must be performed by certified technicians in accordance with applicable safety standards and Directive 2006/42/EC. Otomasyon AVM assumes no liability for misuse or non-compliant installations.