Murphy A25 Series Dimensions, Temperature Ranges and Factory Settings, Temperature Accuracy Chart

	Dimensions
A20 Series Models (typical)		A25 Series Models (typical)

				2-1/4 in.						2-1/2 in.
				(57 mm)						(64 mm)
	PH	Y	S W I C H			G	A	G
			°F
	R								E®
M	U
	160		210		230
130									250

2-29/32 in.

(74 mm)

	HY	S W I	C H G	A
	P				G
	R	°F				E
M	U
						®

2-1/2 in.

(64 mm)

80	100	120	Mounting
			Clamp
°C
2-1/16 in. (53 mm)			1-27/64 in.	Capillary†
				4 ft. (1.2 m)
Mounting hole dia.			(36 mm)
				long
Contact
Adjustment
1/16 in. hex			1-1/2 in.
		1/2 NPT
			(38 mm)	5/8-18 U.N.F.
		Adapter Nut†	Sensing Bulb†	Union Nut

160	210		230
130				250
80		100
				120
	°C

2-11/16 in. (68 mm) Mounting hole dia.

Contact

Adjustment

Mounting

Clamp

1-11/32 in.

(34 mm)

1-1/2 in.

Capillary†

4 ft. (1.2 m) long

1/16 in. hex

†Standard combinations. See Murphy bulletin T-8428B for optional sensing bulb, engine adaptors and capillary combinations.

1/2 NPT

Adapter Nut†

(38 mm)

Sensing Bulb†

5/8-18 U.N.F.

Union Nut

Temperature Ranges and Factory Settings

NOTES

1.Values in ( ) are mathematical conversions from °F to °C–they do not reflect actual second scale range. U.S.A. standard scale is °F/°C.

2.For models A20TE and A25TE; the switch trip point cannot be set at either the low or high extreme of the scale. The trip point must allow for the reset differen- tial.

3.For adjustable switch models, the trip point is adjustable only over the upper half of the scale.

	Ranges Available								Hi/Lo Settings		20TABS and 25TABS Settings
				Max. Temp.		Std. Settings*
Dual Scale Dial		Single Scale							Low	High		Alarm**			Shutdown
°Fahrenheit (°Celsius)		°Celsius only		°F (°C)		°F (°C)		°C only	°F (°C)	°F (°C)	°F (°C)		°C only	°F (°C)		°C only
								––
			185		(85)	110	(43)		32 (0)	110 (43)
											100 (38)		––	110 (43)		––
32 – 120	(0 – 49)	––
32 – 160	(0 – 71)	0 – 70	215		(102)	150 (66)		66	32 (0)	150 (66)	140 (60)		60	150 (66)		66
130 – 220	(54 – 104)	45 – 100	260		(127)	210	(99)	85	160 (71)	210 (99)	200	(93)	80	210 (99)		85
130 – 250	(54 – 121)	50 – 120	310 (154)			210 (99)		97	160 (71)	210 (99)	200	(93)	95	210	(99)	100
140 – 300	(60 – 149)	60 – 140	340 (173)			275	(135)	130	200 (93)	275 (135)	265 (129)		125	275	(135)	130
160 – 320	(71 – 160)	70 – 160	370		(192)	300 (149)		150	200 (93)	300 (149)	290 (143)		145	300	(149)	150
180 – 350	(82 – 177)	––	400 (209)			330 (166)		––	240 (116)	330 (166)	320	(160)	––	330 (166)		––
300 – 440	(149 – 227)	––	500		(260)	400	(204)	––	300 (149)	400 (204)	390	(199)	––	400 (204)		––

*Standard setting for A20T, A25T, A20TE and A25TE models. ** SPDT snap-switch is the alarm switch.

Temperature Accuracy Chart

Temperature Range	Lower 1/3 of Scale	Middle 1/3 of Scale	Upper 1/3 of Scale
32 to 120°F (0 to 49°C)	± 12°F (± 6°C)	± 5°F (± 2.4°C)	± 6°F (± 3°C)
32 to 160°F (0 to 71°C)	± 20°F (± 10°C)	± 8°F (± 4.4°C)	± 7°F (± 4°C)
130 to 220°F (54 to 104°C)	± 6°F (± 3°C)	± 3°F (± 1.6°C)	± 4°F (± 2°C)
130 to 250°F (54 to 121°C)	± 9°F (± 5°C)	± 5°F (± 2.4°C)	± 4°F (± 2°C)
140 to 300°F (60 to 149°C)	± 10°F (± 5.2°C)	± 6°F (± 3°C)	± 5°F (± 2.4°C)
160 to 320°F (71 to 160°C)	± 10°F (± 5.2°C)	± 5°F (± 2.4°C)	± 5°F (± 2.4°C)
180 to 350°F (82 to 177°C)	± 12°F (± 6°C)	± 5°F (± 2.4°C)	± 5°F (± 2.4°C)
300 to 440°F (149 to 227°C)	± 9°F (± 5°C)	± 5°F (± 2.4°C)	± 4°F (± 2°C)

Maximum Temperature

MAXIMUM AMBIENT TEMPERATURE: -40° (-40°) thru 150° (66°)

RANGE	MAXIMUM PROCESS TEMPERATURE
≤250° (120°)	120% OF FULL SCALE
300° (140°)	350° (198°)
≥320° (160°)	120% OF FULL SCALE

Bulletin AT-95026B page 2 of 4