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TOLL FREE
APPLICATION ASSISTANCE
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Low
Pressure Diaphragm Gauge
Series 1490, Grade A (2-1-2%) |
- 2½" and 3½" dial size
- Glass-filled polysulfone case material
- Beryllium copper diaphragm
- Brass Socket
- Wetted materials of beryllium copper, brass,
polysulfone and RTV silicone
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The
Ashcroft® Type 1490 low pressure diaphragm gauge is designed to measure
pressure from 10 in.H2O to 15psi, both
positive and negative pressures. This gauge uses a very sensitive
diaphragm capsule to measure low pressure and vacuum. The gauge is
specifically designed for use whenever the pressure medium is a gas that
is not corrosive to beryllium copper, brass, polysulfone and RTV
silicone. Typical applications are, but not limited to, vacuum pumps,
gas leak detectors, air compressors, air filters, gas burners, gas
measurement, vacuum ovens, suction regulators and respirators. |
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| SELECTION
TABLE |
| Dial
Size |
Type |
Wetted
Material |
Conn.
Size & Type |
Connection
Location |
Ranges |
Optional
features |
| Code |
Desc. |
Code |
Description |
Code |
Description |
Code |
Description |
Code |
Description |
Code |
Description |
Code |
Description |
25
35 |
2½"
3½" |
1490 |
Low
Pressure
Diaphragm Gauge |
A |
Beryllium
Copper
Brass Socket
Polysulfone
RTV Silicone |
01
02
HD
HE
HF |
1/8
NPT
1/4 NPT
1/8 Hose Barb(2)
3/16 Hose Barb(2)
1/4 Hose Barb(2) |
L
B
T
D
E |
Lower
Center Back
Top
3 o'clock
9 o'clock |
10IW |
0
to 10"H2O
Click here for chart of common
ranges |
XAK
XAN
XDA
XNH
XNN
XTU
XUC |
Autoclavable
1% Accuracy
Dial Marking
SS Tag
Paper Tag
Throttle Plug
U-Clamp |
(2)
U-Clamp furnished when hose barb specified
| PART
NUMBER FOR A LOW PRESSURE DIAPHRAGM GAUGE: |
| Select: |
25 |
1490 |
A |
02L |
XXX |
10"H2O |
| |
Dial
Size - 2½" |
Case
Code: 1490 |
Tube
and socket material |
Connection
¼NPT (02),
¹/8NPT (01),
Lower (L),
Back (B) |
Optional
Features
Click here for common Options |
Standard
Pressure Range
Click here for common
Pressure
Ranges |
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|
Low
Pressure Diaphragm Gauge
Series 1187, 1188 & 1189
Grade A (2-1-2%) |
- Available in 4½", 6" ad 8½" dial
sizes
- Bellows-actuated mechanism
- Three bellows materials
- Nonajustable, narrow-edge pointer for easy
reading
- Phenolic (1188) or aluminum (1187, 1189) cases
- All-stainless steel movements
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|
Ashcroft®
bellows gauges are used for measuring low pressures from 10" H2O
to 10 psi pressure as well as vacuum and compound ranges. Coupled with
their sensitivity, these gauges have a rugged design for process and
industrial applications. |
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| CASE
SELECTION TABLE |
| Dial
Size |
Case
Type |
Case
Material |
Ring
Style |
Mounting |
| 4½",
6" 8½" |
1187 |
Aluminum,
black epoxy coated |
Hinged
steel, black crinkle enamel |
Flush
- Back only |
| 4½" |
1188 |
Phenolic,
black |
Threaded
polypropeline ring |
Stem
- lower of back
Surface - lower or back
Flush - back (order 1278M mouting ring, specify X56) |
| 4½",
6" 8½" |
1189 |
Aluminum,
black epoxy coated |
Threaded
polypropeline ring |
Stem
- lower of back
Surface - lower or back
Flush - back (specify X50) |
| BELLOWS
SYSTEM/RANGE SELECTION(1) |
| Order
Code |
Bellows
& Socket |
Pressure
Range |
Vacuum
Range |
Compund
Range |
NPT
Conn.(2) |
| A |
Brass |
10"H2O
to 10 psi |
10"H2O
to 20" mercury |
5"H2O
vac. & 5"H2O press. to 10" mercury vac. & 5
psi |
¼ |
| S |
316SS |
10"H2O
to 10 psi |
10"H2O
to 20" mercury |
5"H2O
vac. & 5"H2O press. to 10" mercury vac. & 5
psi |
¼ |
| P |
Monel |
10"H2O
to 10 psi |
10"H2O
to 20" mercury |
5"H2O
vac. & 5"H2O press. to 10" mercury vac. & 5
psi |
¼ |
(1) For selection of the correct bellows system
material, see the media
application table
(2) Optional connection ½NPT
| PART
NUMBER FOR A LOW PRESSURE GAUGE: |
| Select: |
45 |
1188 |
AS |
02L |
XXX |
10"H2O |
| |
Dial
Size - 4½" |
Case
Code: 1188 |
Bellows
and socket material |
Connection
¼NPT (02),
½NPT (04),
Lower (L),
Back (B) |
Optional
Features
Click here for common Options |
Standard
Pressure Range
Click here for common
Pressure
Ranges |
| (*)
Denotes solid-front case design. |
| 1-877-ASHCROFT |
Credit Cards Accepted by PSI
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