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Type ELH100 High Precision Sensing Head

The Type ELH100 High Precision Sensing Head is a robust weatherproof sensor fitted with a very accurate ELECTROLEVEL tilt transducer.
For permanent outdoor installation, the ELH100 can be bolted to the structure to be monitored, and connected to a suitable electronic Signal Conditioning Unit up to 100 metres away

ELH100-101.jpg

The standard sensor is made from steel with a corrosion-protecting plated finish.
For severe environments and specialist applications, the ELH100 can be supplied in Naval Brass, Aluminium Bronze or Stainless Steel.


For applications where a good quality reference surface is not available, the ELH100 may be fitted to an Adjustable Pivot Mounting (Accessory type ELA300).
The base of the ELA 300 is mounted on the structure under test, and the ELH100 is set accurately to read zero with precisely adjustable jacking screws.(See Picture)

Type ELH100 High Precision Sensing Head
fitted to Adjustable Pivot Mounting Type ELA300

The ELH100 is one of a family of sensors which use the ELECTROLEVEL tilt transducer. A curved glass tube holds a conducting fluid and a bubble of gas.
Just like a conventional spirit level, the bubble always settles at the highest point in the tube. Using electrodes built into the tube, the position of the bubble is measured electronically to a very high accuracy. In use , the smallest movement of the sensor will cause the fluid to flow and the output signal to change. the resolution of the sensor is thus effectively infinite, and unlike mechanical sensors, there is no stiction or friction or hysteresis to cause inaccuracy and nothing to wear out.




SPECIFICATION                 ELH100 High Precision Sensing Head
Parameter

AS A TILT TRANSDUCER

Linear Range (typical)

Linearity Error (max)

Asymmetry Error (max)

Unambiguous Range

Discrimination

Datum Change
for ±5 ° Tilt about Cross Axis (max)

Temperature coefficient
with Matched Detector
-10°C to 25°C
+25°C to + 60°C

Datum Temperature Drift (max)

AS AN ACCELEROMETER

Linear Range

Unambiguous Range

Equivalent Pendulum length

Undamped Natural Frequency

Damping Factor at 25°C

PHYSICAL PROPERTIES

Datum Stability Long Term

Datum Stability Short Term

Settling Time to <1%

Value



±0.5

1.0

2.0

±2.0

0.01


1




0.2
-0.1

0.3



±0.01

±0.1

305

1

0.6



10

1

5
Units



Degrees

%

%

Degrees

arc-seconds


arc-mins




%/°C (max)
%/°C (max)

arc sec/°C



g Units

g Units

mm

Hz





arc-sec/month

arc sec/hour

seconds
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.

  Download Data Sheet as .PDF File (60Kbytes)

2008 Tilt Measurement Limited