Jewell Instruments D801 Specifications

Model D801 “Tuff Tilt Digital” Tiltmeter

The model D801 “Tuff Tilt Digital” is a high
performance, digital tiltmeter with advanced
firmware features. Units use a gravity referenced
electrolytic tilt sensor with superior measurement
accuracy and virtually no long-term drift. Output is
RS232 or RS422 (RS485 full duplex). Utilizing a 16-bit

A/D, the D801 is sensitive to <0.0001° (.0017

mm/m).* User programmable firmware controls
include sample averaging, auto-zero (tare),
baud/output rate, and more. The D801 also includes
on-board memory, with storage capacity up to
22,000 samples. All units are rated IP65 waterproof
for advanced protection from the elements. Use the
D801 “Tuff Tilt” for structural monitoring, platform
position and control, and more.

High-Gain Standard Wide-Angle
Angular Range
Resolution
Repeatability
Non-Linearity 0.1% 0.1% 0.1%
Kz Coefficient (°/°C) ±0.0002 degree/°C (typical) ±0.004 degree/°C (typical)
Output RS232, RS422 (RS485 full duplex)
Output Format NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N)
Baud Rate 9600 (default), 19200, 28800, 57600, 115200, 130400
Channels X-tilt, Y-tilt, Temperature, Serial No.
Time Constant 0.15 sec
Power 7-28 VDC @ 30mA, 250 mV ripple max, reverse polarity protected
Environmental -40 to +85 C operation and storage; IP65
Dimensions 120 x 80 x 60 mm, 0.6kg (1.5 lbs)
Materials Diecast painted aluminum
Cable 3m (10 ft.), 6 conductors + one overall shield, PVC jacket.

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

±0.5° ±3° ±50°

<0.0001° 0.0001° 0.002°

0.0003° 0.0003° 0.004°

DB9 connector for digital I/O.

Ordering Code: Accessories:

Part No. Description

70369

00254-02

81439

84051

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

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

6-conductor cable
(specify total length on order)

Extra power transformer
(100-240VAC to 12VDC)
Mounting bracket for vertical
surfaces
Mounting plate for horizontal
surfaces

L00265 Rev. B

Model D801 “Tuff Tilt Digital” Tiltmeter

Enclosure Dimensions

Cable Wiring and Pin-outs

Dimensions in inches (mm)

RS232 Wiring

Wire Color Function DB9 Pin-out
Black GND 5
Red V+ (Power) -­ Green Analog X Out -­ Yellow RxD (RS232) 3
White TxD (RS232) 2
Blue Analog Y Out --

RS422 Wiring

Wire Color Function DB9 Pin-out
Black GND 1
Red V+ (Power) -­ Yellow Rx-(RS422) 9
Blue Rx+ (RS422) 8
Green Tx+ (RS422) 4
White Tx- (RS422) 5

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

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

L00265 Rev. B