Sensor Characteristics for Satchwell Controller Type Sensors

[Product_Support]

Issue

Technicians require accurate resistance values for Satchwell and Sontay sensors to validate performance and troubleshoot temperature-related issues.

Product Line

Field Devices, Satchwell BAS & Sigma, Satchwell MicroNet

Environment

• Satchwell BAS & Sigma
• Satchwell MicroNet

Cause

Resistance values vary by sensor type and temperature. Having a reference chart ensures correct diagnostics and sensor replacement.

Resolution

Below is a reference table showing resistance values for various Satchwell and Sontay sensor types across a range of temperatures.

Sensor Resistance Table

DRT, DOT, DDT, DWT, DST, DOS			DD 1401, DW 1202, DR 2253, DWS 1301			DW 1204, DWS 1202			DO 2202
Sontay SAT 1			Sontay SAT 2			Sontay SAT 3			Sontay SAT 4
°C	Ohms		°C	Ohms		°C	Ohms		°C	Ohms
-40	9711		0	2094		20	2708		-40	2317
-35	9604		1	2079		25	2592		-35	2246
-30	9465		2	2063		30	2474		-30	2163
-25	9288		3	2046		35	2346		-25	2067
-20	9067		4	2027		40	2216		-20	1962
-15	8796		5	2010		45	2086		-15	1849
-10	8472		6	1992		50	1950		-10	1733
-5	8093		7	1973		55	1818		-5	1617
0	7661		8	1953		56	1792		0	1504
5	7182		9	1934		57	1766		5	1397
10	6667		10	1911		58	1741		10	1298
15	6126		11	1892		59	1718		15	1208
20	5573		12	1872		60	1694		20	1128
25	5025		13	1851		61	1669		25	1057
30	4492		14	1830		62	1646		30	996
35	3987		15	1809		63	1622		35	942
40	3518		16	1787		64	1600		40	897
45	3089		17	1764		65	1578
50	2702		18	1740		66	1553
55	2358		19	1716		67	1530
60	2056		20	1690		68	1508
65	1792		21	1667		69	1484
70	1563		22	1644		70	1461
75	1364		23	1621		71	1439
80	1193		24	1596		72	1417
85	1047		25	1574		73	1396
90	921		26	1549		74	1375
95	815		27	1524		75	1353
100	722		28	1500		76	1333
105	643		29	1476		77	1312
110	575		30	1452		78	1293
115	517		31	1430		79	1276
120	466		32	1406		80	1258
125	423		33	1383		81	1240
130	386		34	1359		82	1222
135	353		35	1336		83	1205
140	324		36	1312		84	1188
145	300		37	1289		85	1171
150	278		38	1267		86	1154
			39	1243		87	1138
			40	1219		88	1122
			41	1198		89	1107
			42	1176		90	1089
			43	1155		91	1075
			44	1134		92	1061
			45	1113		93	1047
			46	1092		94	1033
			47	1072		95	1020
			48	1052		96	1004
			49	1033		97	991
			50	1013		98	978
						99	964
						100	950

📎 Note: These values are approximate and may vary slightly depending on installation conditions. Always refer to the official datasheet or use calibrated instruments for precise diagnostics.

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