Type ELD201 Single Channel Portable Digital Indicator

The Type ELD201 single channel portable digital indicator is a versatile component which can be used to indicate the tilt angle measured by any of the range of ELECTROLEVEL tilt transducers.
The measured angle is displayed on a 3 1/2 digit LCD meter
The ELD201 can be powered by its internal battery, or through a universal AC mains adaptor, or use an external unregulated DC power supply from a wide range of sources anywhere in the range 6-28Volts.

Type ELD201 Single Channel Portable Digital Indicator.

This low power consumption unit can be scaled to provide a digital reading representing common standard units e.g
  • arc-seconds
  • decimal degrees
  • millimetres per metre
or custom scaled to user significant units e.g millimetres of deflection over a standard base line.

A voltage output signal is provided which is suitable for driving external meters, data loggers, data acquisition systems and power amplifiers for control systems.

Proprietary circuit techniques match the Signal Conditioning Unit to the attached sensor and minimise the effects of temperature scale drift and temperature datum drift, thus contributing to the high precision of an ELECTROLEVEL system

Where long cables to an external port need to be driven, the ELD201 should be placed within 100 metres of the sensing head and the optional 4-20mA current loop used to drive the longer cable. (requires 24Volt supply)

The standard Single Channel Portable Digital Indicator is housed in an Aluminium Instrument case.

For severe environments and specialist applications, the ELD201 can be supplied in weatherproof housings to IP67 protection or above.

Robust circular DIN style connectors are fitted to the ELD201 giving a long term reliable connection to the sensing head.
World Standard power jacks are used for the connection to the power supply and signal connectors.

The ELD201 is one of a family of Signal Conditioning Units suitable for driving the ELECTROLEVEL tilt transducers. Other units in the range include signal conditioning units, indicators with analogue displays, with limit relays which operate at user definable angles and units which provide digital outputs in a variety of interface specifications.;
Dual channel units are also available in all these options.
For specialist applications, the Signal Conditioning Unit circuits can be supplied for mounting in Standard Rack systems with multi-channel cards and microprocessor control of the data acquisition function

SPECIFICATION                 ELD201 Single Channel Portable Digital Indicator
Signal Conditioning Unit
Output voltage

Output current

Temperature Coefficient of Scale

Zero drift with temperature

Electronic datum Adjustment Range

Operating Temperature Range to above specification

Overrange Capability


Input Power Consumption

External Connections

Sensing Head
D.C. supply and External Meter

Sensing head cable length

Power Supply
Internal battery
External DC supply
Universal mains adaptor

Physical Details




± 1 volt d.c. maximum into open circuit with respect to datum reference at 2.5 Volts above system ground.

± 1 mA d.c. into short circuit (short circuit protected).
(4-20mA current loop option)

0.1%/ ° C

100mV/° C

± 0.1 degrees with 0.5 degree Sensing Head
± 1.0 degrees with 5.0 degrees Sensing Head

-15 °C to + 60 °C

will not be damaged by overranged transducer input

3 1/2 Digit LCD meter 11mm digit height.
scaled as required.

10 mA at 12V d.c.

Metal Screwlocking DIN style plug
World Standard Power Jacks

100 metres (maximum recommended)

PP3 batteries
6 to 28 volts d.c.
90/264 Volts ac 47/63 Hz

painted Aluminium non-weatherproof

185mm W x 65mm H x 180 mm D

1.05 Kg

All specifications herein were in effect on the date of this publication. Equipment supplied however,may differ from that specificied due to Tilt Measurement's policy of continual product improvement. The equipment described herein is manufactured in the UK.

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2008 Tilt Measurement Limited