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Jewell Model 801 “Tuff Tilt” Tiltmeter Series

Updated:2026-01-24

Brand: Jewell
Model: Model 801
Description: The Model 801 “Tuff Tilt” Tiltmeter series combines high precision and durability in an economical instrument package. Using an absolute gravity referenced electrolytic sensor, the 801 series delivers
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Jewell Model 801 “Tuff Tilt” Tiltmeter Series Description：

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The Model 801 “Tuff Tilt” Tiltmeter series combines high precision and durability in an economical instrument package. Using an absolute gravity referenced electrolytic sensor, the 801 series delivers superior measurement accuracy with virtually no long-term drift. Units are available in a variety of configurations including single axis (uniaxial), or dual axis (biaxial), analog, digital, or 4-20mA outputs.

Specifications

A801: ±5V Output

	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%	? span: 1% Full span: 2%
Scale Factor (°/V)	0.1	0.6	10
Time Constant	1.75 sec (2-pole Butterworth low-pass filter)		0.15 sec
Kz Temperature Coefficient (°/C, typical)	±0.0002
Ks Temperature Coefficient (%/°C, typical)	0.02
Output (Vdc)	Single-ended: ±5 Differential: ±10
Channels	Tilt, Temperature
Output Impedance (Ω)	270
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	Operation: -25 to +70°C Storage: -30 to +100°C
Seal	IP65
Materials	Diecast painted aluminum
Cable	3m (10 ft) 6 conductor + one overall shield, PVC jacket, tined ends

C801: 4-20mA Output

	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 (°/V)	0.1	0.6	10
Time Constant	0.15 sec
Kz Temperature Coefficient (°/C, typical)	±0.0002		±0.002
Ks Temperature Coefficient (%/°C, typical)	<0.04		<0.1
Output	4-20mA Two-wire current loop (per axis)
Channels	Tilt, Temperature
Output Impedance (Ω)	270
Temperature Output¹	-50 to 150°C
Power	(0.02 Ampere x R + 10 Vdc) < Vs < 29 Vdc
Environmental	-40 to +85°C operation and storage.
Seal	IP65
Materials	Diecast painted aluminum
Cable	3m (10 ft) 6 conductor + one overall shield, PVC jacket, tined ends

D801: Digital Output

	High Gain	Standard	Wide Angle
Angular Range (°)	±0.5	±3.0	±50
Resolution (°)	<0.0001	0.0001	0.002
Repeatability(°)	0.0003	0.0003	0.004
Non-linearity	1%	2%	0.5%
Time Constant	0.15 sec
Kz Temperature Coefficient (°/C, typical)	±0.0002		±0.004
Output	RS-232, RS-422 (RS-485 full-duplex)
Output Format	NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N)
Channels	Tilt, Temperature
Baud Rate	9600 (default), 19200, 28800, 57600, 115200, 230400
Power	7-28 VDC @ 30mA, 250 mV ripple max, reverse polarity protected
Environmental	-40 to +85°C operation and storage.
Seal	IP65
Materials	Diecast painted aluminum
Cable	3m (10 ft) 6 conductor + one overall shield, PVC jacket, tined ends