SMC Standard Pressure Gauges

SMC offers a range of standard pressure gauges designed for modular air component systems. These gauges are readily stocked and available for quick delivery.

Product Overview

The following table provides an overview of the available standard pressure gauges, including their size, thread location, thread size, material, and units.

SIZE	THREAD LOCATION	THREAD SIZE	MATERIAL (CASE/SOCKET)	UNITS
27mm (1")	CBM	1/8 NPT	Urban White POLYAMID/POLYAMID	psi
40mm (1 1/2")	CBM	1/8 PT	Urban White ABS/POLYAMID	Mpa & psi
50mm (2")	CBM	1/4 NPT	Urban White ABS/POLYAMID	Mpa & psi

Part Numbers

The part numbers listed below correspond to standard stocked gauges. Delivery time for these gauges is approximately 1 week.

SCALE	PART NUMBER
0~30 psi	K27A-P0.2-N01M, K27A-P0.2-01M, K40A-P0.2-N01M, K40A-P0.2-01M, K50A-P0.2-N02M, K50A-P0.2-02M
0~60 psi	K27A-P0.4-N01M, K27A-P0.4-01M, K40A-P0.4-N01M, K40A-P0.4-01M, K50A-P0.4-N02M, K50A-P0.4-02M
0~160 psi	K27A-P1.0-N01M, K27A-P1.0-01M, K40A-P1.0-N01M, K40A-P1.0-01M, K50A-P1.0-N02M, K50A-P1.0-02M

Important Delivery Information

The delivery time for standard stocked gauges is approximately 1 week. For made-to-order options, delivery can take up to 14 weeks for the initial order, and up to 10 weeks for subsequent orders. For shorter delivery times, SMC recommends selecting a part number from the standard stocked list.

Model Number Configuration

The following outlines the configuration of the model numbers for SMC pressure/vacuum gauges:

Measurement: Nil (Pressure), Z (Vacuum), K (Pressure & Vacuum)
Thread Location: Nil (Back mount), A (Bottom mount), B (Left side mount), C (Top mount), D (Right side mount)
Case Size: 27 (1" / 27mm), 40 (1 1/2" / 40mm), 50 (2" / 50mm)
Case/Thread Material: Nil (ABS/Brass), A (ABS/Polyamid - Urban White), N (Stainless steel/nickel plated brass), P (Painted steel/brass), S (Stainless steel/stainless steel)
Pressure Units: Nil (MPa), B (bar), K (KPa), M (MPa), P (psi)
Vacuum Units: Nil (mmHg), A (inHg), C (kPa)
Auxiliary Option: Nil (No option), B (02 clean/no oil), C (Panel mount), C1 (Panel mount w/polished SS ring), C2 (Panel mount with adapter ring), L (Liquid filled), M (Mark pointer), R (Restrictor), S (SAN convex lens), W (Washdown)
Thread Option: M (M5 Female thread), S (Sealant)
Thread Size: 01 (1/8), 02 (1/4)
Thread Type: Nil (R(PT)), N (NPT)
Scale: 0.1, 0.2, 0.4, 0.7, 1.0, 1.5, 2.0 (MPa)

Combination Table

The following table indicates possible combinations for gauge configurations. Consult the factory for minimum order quantities and delivery times for non-standard combinations.

	A	B	C	D	27	40	50	A	N	P	S	B	K	M	P	0.1	0.2	0.4	0.7	1.0	1.5	2.0	A	C	N	01	02	M	S	B	C	C1	C2	L	M	R	S	W
Thread Location	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Case Size	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Case/Thread Material	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Units	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Scale	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Vacuum Units	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Thread Type	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Thread Size	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X
Auxiliary Option	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X	X

Dimensional Drawings

Detailed dimensional drawings are provided for the K27A, K40, and K50 series pressure gauges. The diagrams illustrate various dimensions such as A, B, C, D, E, F, G, H, J, K, L, M, and N, with measurements in millimeters (mm) and inches (in). Specific details for different series and options are presented in the tables below.

K27A Series Dimensions

Series	A	B	E	F	G	H	J	K	L	M	N
1" K27A	1.10 (28)	.65 (16.5)	1.06 (27)	-	-	-	1/8 PT or NPT	-	-	-	-
1" K27	1.10 (28)	.67 (17)	1.06 (27)	-	-	-	1/8 PT or NPT	-	-	-	-

K40 Series Dimensions

Series	A	B	E	F	G	H	J	K	L	M	N
1 1/2" K(Z)40(A)	1.61 (41)	1.02 (26)	1.73 (44)	1.85 (47)	-	-	.55 (14)	1/8 or 1/4 PT or NPT	-	-	-
1 1/2" K(Z)40 P	1.57 (40)	1.04 (26.5)	1.63 (41.5)	1.75 (44.5)	-	-	.55 (14)	1/8 or 1/4 PT or NPT	-	-	N, S
1 1/2" K(Z) 40	1.57 (40)	.91 (23)	1.42 (36)	.31 (8)	.47 (12)	-	1/8 PT or NPT	-	-	-	N, S

K50 Series Dimensions

Series	A	B	E	F	G	H	J	K	L	M	N
2" K(Z)50(A)	1.93 (49)	1.04 (26.5)	1.75 (44.5)	1.87 (47.5)	-	-	.55 (14)	1/8 or 1/4 PT or NPT	-	-	-
2" K(Z)50	1.93 (49)	1.06 (27)	1.79 (45.5)	1.91 (48.5)	-	-	.55 (14)	1/8 or 1/4 PT or NPT	-	-	N, S
2" K(Z) 50	1.93 (49)	1.06 (27)	1.65 (42)	1.77 (45)	.39 (10)	.55 (14)	1/8 or 1/4 PT or NPT	-	-	N, S

Panel Mounting Dimensions

The following diagrams and tables provide details for panel mounting, including optional adapter rings and required hole sizes.

Diagram 1: Optional adapter ring for larger panel hole (K50 only)

This diagram shows an optional adapter ring for the K50 series, illustrating an internal adapter ring (K50-00-00-1) and customer panel dimensions.

Series	A	B	C	D	E	F	G	J	K	L	M	Hole Min.	Hole Max.
1 1/2" K(Z)40	1.77 (45)	.87 (22)	1.57 (40)	2.03 (51.5)	2.15 (54.5)	.16 (4)	.93 (23.5)	1.85 (47)	.55 (14)	1/8 or 1/4 PT or NPT	M4X0.7X20 Slotted Cheese Head	9/16 (14)	1 19/32 (40.5)	1 21/32 (42)
2" K(Z)50	2.13 (54)	.87 (22)	1.95 (49.5)	2.07 (52.5)	2.19 (55.5)	.18 (4.5)	1.11 (28.25)	2.24 (57)	.55 (14)	1/8 or 1/4 PT or NPT	M4X0.7X20 Slotted Cheese Head	37/64 (14.5)	1 31/32 (50)	2 1/32 (51.5)

Diagram 2: Panel mounting details

This diagram illustrates the mounting screw (L), customer panel, and maximum panel thickness (M) for gauge installation.

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