Jewell Instruments A820 Specifications

Model A820 Shallow Water Analog Tiltmeter

High-Gain

Standard

Wide-Angle

Angular Range

±0.5

±3.0

±50

Resolution

<0.0001

0.0006

0.01

Repeatability

<0.0002

0.001

0.02

Non-Linearity

1%

2%

0.5%

Scale Factor

0.1/V

0.6/V

10/V

Time Constant

1.75 sec (2-pole Butterworth low-pass filter)

0.15 sec

Kz Temp Coefficient

±0.0002 °/°C (typical)

±0.002 °/°C (typical)

Ks Temp Coefficient

0.04%/°C (typical)

<0.1 %/°C (typical)

Output

±5VDC (single ended)

Channels

Tilt, Temperature

Output Impedance

270 ohms

Temperature Output

0.1C/mV typical (single ended; 0C = 0mV)

Power

8-18 VDC @ 8mA, 250 mV ripple max, reverse polarity protected

Environmental

-4 to +60° C operation; -30 to +100° C storage. Submersible to 200 meters (656.2 ft)

Mounting

Two no. 10 stainless steel mounting screws.

Dimensions & Weight

92.1 x 112.4 x 61 mm; 1.6 kg

Materials

316 SS

Housing Connector

6-pin bulkhead, male plug

Mating Cable

6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24”

Specifications subject to change without notice on account of continued product development

Wiring/Pin-out:

Pin

Wire Color

Function

1

Black

Power Ground

2

White

Signal Ground

3

Red

Power

4

Green

X - Tilt

5

Orange

Temperature

6

Blue

Y – Tilt

The model A820 Shallow Water is a high­precision submersible tiltmeter for use in fresh
and salt water applications. Using an absolute
gravity referenced electrolytic sensor, the A820
delivers superior measurement accuracy with
virtually no long-term drift. High-gain units are
sensitive to <0.0017 mm/m or better. Output is
a stable ±5 DC voltage, which can be read with
any VDC input data recorder. All units are rated
to 200 meters (656.2 ft) waterproof for
advanced protection from the elements. Use
the A820 “Shallow Water” for structural
monitoring, angle measurement and control,
platform leveling and more.

How to Order:

Page 1 of 2

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

[e-mail] • www.jewellinstruments.com • Tel [phone]

L00262 Rev. C

Model A820 Shallow Water Analog Tiltmeter

UNITS: [mm]

IN

Dimensions:

Part Numbers:

Page 2 of 2

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

[e-mail] • www.jewellinstruments.com • Tel [phone]

L00262 Rev. C