D-models are typically used for measurements on objects moving parallel to the axis of the sensor.

The output voltage function for D-model sensors includes a near range where the voltage increases with distance, an optical peak range, and a far range where the output voltage decreases with distance.

Operation at close range results in high sensitivity with a limited measuring range. Long-range operation gives moderate sensitivity with a larger measurement range.

D-type sensors are fast-acting sensors that are ideal for dynamic applications with uniaxial movement, such as those found in actuators, pistons, and valves.

DC-20KHz is standard
DC-200KHz or higher is optional
DC-100 Hz provides the best resolution

Standard analog sensor units include:

Electronics with 0 to +5 VDC output
1 meter long fiber optic cable

Distance Sensors Dependent on reflection

Model	Tip Diameter	Total Range	Near Side Range	Near Side Resolution at 100Hz	Far Side Range	Far Side Resolution at 100Hz
	mm	mm	mm	µm	mm	µm
D6	0.56	1	0.2	0.080	0.8	0.15
D12	0.56	2	0.25	0.008	1.75	0.10
D20	0.81	1.3	0.12	0.008	1.15	0.04
D21	0.81	2	0.25	0.015	1.75	0.15
D47	1.61	5	0.3	0.010	4.7	0.10
D63	3.18	3	0.15	0.002	2.85	0.13
D64	3.18	6	0.25	0.008	5.8	0.13
D100	3.18	10	0.4	0.013	9.6	0.2
D125	3.96	15	0.4	0.002	14.6	0.13
D169	4.76	20	0.5	0.008	19.5	1.25
D170	4.76	30	0.9	0.008	29.1	0.6
D171	4.76	50	9.5	0.13	40.5	0.6
D240	7.92	76	14	0.5	62	1

Displacement Sensors Reflection Dependent - Digital

Model	Tip Diameter	Total Range	Near Side Range	Near Side Resolution at ADC AVG 4096	Far Side Range	Far Side Resolution ADC AVG 4096
	mm	mm	mm	nm	mm	nm
DMS-D6	0.56	1	0.25	5	1	35
DMS-D12	0.56	2	0.25	2.5	1.75	15
DMS-D20	0.81	1.3	0.12	2.5	1.15	8
DMS-D21	0.81	2	0.25	2.5	1.75	15
DMS-D47	1.61	5	0.3	2.5	4.7	40
DMS-D63	3.18	3	0.15	0.5	2.85	10
DMS-D64	3.18	6	0.25	0.3	5.8	15
DMS-D100	3.18	10	0.4	5	9.6	15
DMS-D125	3.96	15	0.4	1	14.6	15
DMS-D169	4.76	20	0.5	5	19.5	80
DMS-D170	4.76	30	0.9	10	29.1	130
DMS-D171	4.76	50	9.5	50	40.5	100
DMS-D240	7.92	76	14	150	62	250