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LIS, Inc. provides Loop Detectors, Preformed Loops, Preformed loop, Surface Mount Loops, Saw Cut Loops, Pave Over Loops, High Temperature Loops, Inductive Loops, Loop Sealant, Loop Sealer, Automatic Gate and Door Accessories, Loop Installation Equipment, Loop Test Equipment, Megger, Loop Tester, Vehicle Detection Loop Systems

By Size & Number of Turns

4 FOOT LOOP WIDTH
Loop Size (ft)	Inductance				Loop Size (ft)	Inductance			Loop Size (ft)	Inductance
Loop Size (ft)	2 Turn	3 Turn	4 Turn	5 Turn	Loop Size (ft)	1 Turn	2 Turn	3 Turn	Loop Size (ft)	1 Turn	2 Turn
4 x 4	20	44	78	125	4 x 35	35	105	235	4 x 70	67	201
4 x 6	25	56	100		4 x 40	39	119	266	4 x 75	71	215
4 x 10	36	81	144		4 x 45	44	132		4 x 80	76	228
4 x 15	50	112	199		4 x 50	49	146		4 x 85	81	242
4 x 20	64	143	253		4 x 55	53	160		4 x 90	85	256
4 x 25	78	174			4 x 60	58	174		4 x 95	90	270
4 x 30	91	204			4 x 65	62	187		4 x 100	94	283

6 FOOT LOOP WIDTH
Loop Size (ft)	Inductance				Loop Size (ft)	Inductance			Loop Size (ft)	Inductance
Loop Size (ft)	1 Turn	2 Turn	3 Turn	4 Turn	Loop Size (ft)	1 Turn	2 Turn	3 Turn	Loop Size (ft)	1 Turn	2 Turn
6 x 4	8	25	56	100	6 x 35	38	116	259	6 x 70	72	217
6 x 6	10	31	70	124	6 x 40	43	130		6 x 75	77	231
6 x 10	14	43	96	171	6 x 45	48	145		6 x 80	82	246
6 x 15	19	58	129	229	6 x 50	53	159		6 x 85	87	260
6 x 20	24	72	161	286	6 x 55	58	173		6 x 90	91	275
6 x 25	29	87	194		6 x 60	63	188		6 x 95	96	289
6 x 30	34	101	226		6 x 65	67	202		6 x 100	101	303

Special notes:

1. The optimum operation range is between 70µh and 200µh.

2. All values are calculated using 14ga. wire and a loop having a 20’ twisted lead.

3. Changing the wire gauge will change these values (+ -) 0.02%.

4. Changing the lead length will change these values (+ -) 0.22mh/ft.

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Loop Inductance

Note: All inductance values are expressed in µh (Micro Henry's)