Jewell Instruments A601-2 Specifications

Model A601-2A/2B High-

precision Platform Tiltmeter

The model A601-2 Platform mount tiltmeter is our new
micrometer adjustment design for high precision tilt
measurements. Units come with built in micrometer
leveling legs, for easy installation on any horizontal
surface. The A601-2 also includes two switchable gains
and two low-pass filter settings. Using an absolute
gravity referenced electrolytic sensor, the A601-2
delivers ultra-high sensitivity to <25 nrad with virtually
zero long-term drift. Output is a stable ±8 DC voltage
(±16 VDC differential). Rugged, reliable, and extremely
accurate, the A601-2 is the preferred choice for volcano
monitoring, high-precision geotechnical engineering,
bridge deflection monitoring, precision metrology, radar
platform leveling, and high-accuracy tilt monitoring
applications worldwide.

Model A601-2A (High-gain) Model A601-2B (Mid-Range)
Angular
Range

Scale Factor

Non-Linearity 2.0%
Resolution <25 nradians <50 nradians
Time Constant Filter on: 7.5 sec; Filter off 0.5 sec
Kz Temp Coefficient
Ks Temp Coefficient 0.05%/°C (typical)
Output ±8VDC (single ended); ±16VDC (differential)
Channels X-tilt, Y-tilt, Temperature
Output Impedance 270 ohms
Temperature Output
Power ±11 to ±15 VDC @ +11 and -6mA, 250 mV ripple max, reverse polarity protected
Environmental
Dimensions 6 x 6 x 4 inches (15 x 15 x 10 cm), 3 lb (1.4 kg)
Materials Anodized and painted aluminum

High-Gain:
Low-Gain:
High-Gain:
Low-Gain:

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

±200 μadians (±0.0115°)

±2000 μradians (±0.115°)

25 nradian/mV

250 nradian/mV

±3 μradians/°C (typical)

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

-25 to +70°C operation; -30 to +100°C storage; IP50 Seal

± 400 μradians (±0.0235°)
± 4000 μradians (±0.235°)

50 nradian/mV

500 nradian/mV

Ordering Code Accessories

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

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

Part No. Description

70304

62301

62304

Power/signal cable, 10-conductor
(specify total length on order)
Female panel receptacle (mates to
62302 connector included with tiltmeter)
Extra female in-line receptacle
(one included with tiltmeter)

L00260 Rev. B

Model A601-2A/2B High-

precision Platform Tiltmeter

Dimensions:

Top view

Side view

Wiring/Pin-out:

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

Wire Color Function Bendix Connector

Red +12 to +15V Power H

Black Power Ground A

Violet -12 to -15V Power B

Blue +Y-tilt out G

Brown -Y-tilt out K

Gray -X-tilt out J
Green +X-tilt out C
White Signal ground E

Yellow Temperature out D

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

L00260 Rev. B