WIKA M93X.3A Specifications

R

Diaphragm Seals

Diaphragm-Type Sanitary Gauge Assembly
Type M932.3A - Dry Case
Type M933.3A - Liquid Filled Case

WIKA Datasheet M93X.3A

Applications

 Pharmaceutical Industry
 Biotechnology

 Food & Beverage

Description

Design

All-welded construction in full compliance with ‘3A’ third party

standards and meets the most rigorous biopharmaceutical

industry specications. This assembly has all the advantages
of the 23X.50 series mechanical gauge (ASME B40.100 & EN
837-1) and WIKA combines it with a superior designed sanitary

diaphragm seal. All external stainless steel surfaces are

electropolished and the wetted components have full material
identication and traceability. The diaphragm and its body

have matching convolution patterns to greatly reduce potential

diaphragm damage due to mishandling and to minimize
temperature eects.

Gauge Nominal Size

2-1/2" or 4" – Lower and Back Mount

Process Connection

1-1/2" to 4" Tri-Clamp

Pressure Range

Vacuum and 0 to 15 psi up to 0 to 1000 psi, includes compound
ranges (maximum working pressure is limited by installation
clamp rating). Clamp provided by customer.

Operating Temperature

Ambient: +25°F to +140°F (-4°C to +60°C) – dry or
glycerine lled case
Process: +25°F to +300°F (-4°C to +149°C)

Autoclave: 300°F for one hour

(polysulfone window and dry case w/weep holes)

Dial

White aluminum with black lettering

Accuracy (Ref.@ 73° F)

2-1/2": ±2/1/2% of span
4": ±1.0% of span

WIKA Datasheet M93X.3A 04/2017 Page 1 of 4

®

(‘3A’ third party compliant)

Temperature Eects

0.06 psi maximum per every 10°F process and ambient
temperature change

System Fill (FDA compliant)

Glycerine, KN 7 - Non-vacuum application
Mineral Oil, KN 92 - Vacuum application

Wetted Material

316L stainless steel electropolished

Nominal surface nish Ra ≤ 15 µinch (0.38 µm) per ASME BPE
SF4 (except for weld seam)

Case Material

304 stainless steel electropolished case with vent plug
and stainless steel electropolished twist lock removable

bayonet ring

Window

Polycarbonate or Polysulfone

Pointer

Black aluminum, micro-adjustable, designed for zero
adjustment in eld

M93X.3A Sanitary Gauge

Bourdon Tube & Movement

316L stainless steel bourdon tube and stainless steel movement

Weather Protection

Weather tight to NEMA 4X / IP65 (without optional autoclave
weep holes)

Serial Number and Part Number
Engraved in case of gauge

Material Identication and Heat Numbers

Engraved in seal body or gauge case

2½" & 4" Lower Mount

Documentation

Calibration Conformance Report supplied with each assembly
(not a direct substitute for NIST certicate). Material
Conformance documents supplied with each assembly (not a
substitute for 3.1 EN 10204 material certicate).

Available Options

See Selection Guide (over)

Additional pressure ranges available upon request.

To determine the eects of temperature and response time in a specic
application, contact the factory for an Application Questionnaire. The
information provided will allow WIKA Technical Support to accurately

model your application parameters using state-of-the-art computer
simulation techniques.

2½" Center Back Mount

4" Lower Back Mount

Page 2 of 4 WIKA Datasheet M93X.3A · 04/2017