Dwyer 1000E User Manual

Bulletin IN-100E

1/4 NPT 
PRESSURE 
CONNECTION

1-3/8

[34.93]

2-3/4

[69.85]

4-3/8 [111.13]

3-3/4 [95.25]

8.5

[

215.90]

3-1/4

[82.55]

5-1/4

[

133.35]

1

/2 NPT
CONDUIT
T

HREAD

Ø2-11/32

[

59.53]

18" [457.2 MM]
LEADS FOR 
SPLICING

(2) Ø17/64

[

6.75] 

MOUNTING

HOLES

ADJUSTING

WHEEL

S

AFETY STOPS

DO NOT ALTER

READ
PSIG

INCREASE

Series 1000E Diaphragm Operated Pressure Switches

Installation and Operating Instructions

Series 1000E explosion-proof also available in 1000EH explosion-proof,

hermetically sealed switch assembly.

This control is operated by a negative rate Bellville spring-augmented
diaphragm.

Location and Mounting

Select a location recommended by the equipment manufacturer. Use
the two (2) lugs on the case to mount the control on a panel or smooth
wall surface, or mount directly by the pressure connection.

The control is not position sensitive and may be mounted in any position.
However, vertical is preferred when there is a possibility of sludge
accumulation or condensed water freezing in the pressure chamber.

Pressure Connection

The pressure connection is a standard female 1/4″ NPT taper pipe
thread. Pipe thread sealant tape or pipe thread sealant should be used
to assure a pressure-tight joint. When used on steam, a pigtail siphon
and Type 3 (FEP) diaphragm should be used.

Wiring

Wire in accordance with local electrical codes or equipment
manufacturer’s instructions. Use a short piece of BX between rigid
conduit and control so that control will not be subject to the stress of
conduit expansion and contraction. Electrical ratings are shown on the
label inside the adjusting wheel chamber.

DO NOT OVERLOAD

SPECIFICATIONS
Wetted Materials: Aluminum pressure chamber with polyimide

diaphragm or 316 SS pressure chamber with FEP diaphragm.

Temperature Limits: -30 to 170°F (-35 to 77°C).
Enclosure Rating: Explosion-proof, UL listed for Class 1, Groups A, B,

C and D; Class II, Groups E, F and G.

Switch Type: SPDT snap switch. Hermetically sealed optional.
Electrical Rating: 15A @ 125/250/480 VAC resistive; 0.5A @ 125

VDC, 0.25A @ 250 VDC.
Wiring Connections: 18 AWG, 18˝ (460 mm) color-coded leads: N.O.
(yellow), N.C. (black) and common (red).

Conduit Connection: 1/2˝ male NPT.
Process Connection: 1/4˝ female NPT.
Mounting Orientation: Any position.
Set Point Adjustment: Internal thumbwheel.
Weight: 3 lb (1.4 kg).
Deadband: See chart
Agency Approvals: CE, UL.

Note: When used on steam, a pigtail siphon and Type 3 (FEP)

diaphragm should be used. Maximum case ambient temperature: 170°F
(76.7°C).

Setting Operating Point

Remove the transparent cover over the adjusting wheel. Move the
wheel by hand to the desired pressure on the vertical scale. If the
adjusting wheel is difficult to move, a small screwdriver inserted in the
adjusting wheel arms will provide extra leverage. Safety stops are
provided at the top and bottom of the scale to prevent setting beyond the
control’s range. DO NOT alter. Dial markings are for the High operating
point. Switch will reset at a lower pressure. Dial markings are a guide for
setting. Actual setting should be checked with a good pressure gage.

Warning: A failure resulting in injury or damage may be caused by over­pressures, excessive vibration or pressure pulsation, excessive
temperature, corrosion of pressure-containing parts and movement
assembly, electrical overload or other misuse.

MERCOID DIVISION

DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46360 U. S.A.

Phone: [phone] www.dwyer-inst.com
Fax: [phone] e-mail: [e-mail]

Operating Rages/Deadband

Range No.

3
4
5
6
7
8
9

*Deadband is 10% larger when using 316SS diaphragm.

Code

J

Note (2) Resistive

psig (bar)

5-40 (0.35 - 2.76)
10-70 (0.69 - 4.82)
25 - 200 (1.72 - 13.78)
50 - 350 (3.45 - 24.12)
75 - 550 (5.17 - 37.90)
100 - 900 (6.89 - 62.01)
200 - 1400 (13.78 - 96.46)

No. Switches Action

1 Snap SPDT

Approx. Deadband (fixed)* psig (bar)

2.5 (0.17)
5 (0.35)
10 (0.70)
18 (1.24)
36 (2.48)
60 (4.13)
90 (6.20)

Electrical Rating

AC Capacity

125V

15A

250V

15A

480V

15A

125V

0.5A (2)

DC Capacity

250V

0.25A (2)

AC

125V

1/8

Max. press. without bursting psig (bar)

3000 (206.7)
3000 (206.7)
3000 (206.7)
3000 (206.7)
3000 (206.7)
3000 (206.7)
3000 (206.7)

Horse Power

DC

125V

NA

250V

NA

250V

1/4