GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

LOW PRESSURE TRANSMITTER

ELP SERIES

PRODUCT DESCRIPTION

The Low Pressure Transmitter series is used to

measure positive, negative or differential pressure.

The piezoresistive sensor is ideal for monitoring

the pressure of air or other clean inert gas. Typical

HVAC applications include monitoring of filter

differential pressure or VAV applications. An

integrated static pressure probe provides ease of

installation for duct mounting. Several accessories

are available. A weatherproof polycarbonate

enclosure is provided for electrical connections and

ease of installation.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The ELP mounts on any surface using the two

holes provided on the base of the unit. Make sure

there is enough space around the unit to connect

the pressure tubing without kinking and avoid

locations where severe vibrations or excessive

moisture are present.

The enclosure provides mounting tabs for ease of

installation.

ACCURACY

±1% F.S.O.

MEASUREMENT TYPE

Differential (single port), Static, Velocity, & Total Pressure

RESPONSE TIME

250 ms

STABILITY

<±1% F.S.O. per year

THERMAL EFFECTS

<±3% over compensated range

COMPENSATED RANGE

0° to 50°C (32° to 122°F)

PROOF PRESSURE

40”W.C.

BURST PRESSURE

120”W.C.

OPERATING CONDITIONS

0 to 50°C (32 to 122°F), 5 to 95 %RH, non-condensing

POWER SUPPLY

20 to 28 Vac/dc (non-isolated half-wave rectified)

SUPPLY CURRENT

Current: 20 mA max

Voltage: <4 mA

INPUT VOLTAGE EFFECT

Negligible over specified operating range

PROTECTION CIRCUITRY

Reverse voltage protected and output limited

OUTPUT SIGNAL

4-20 mA (2-wire), 0-10 Vdc (3-wire), field selectable

OUTPUT DRIVE CAPABILITIES

Current: 400 Ω max @ 24 Vdc

Voltage: 10K Ω min

ZERO ADJUSTMENTS

Pushbutton auto-zero

WIRING CONNECTIONS

Screw terminal block (14 to 22 AWG)

PRESSURE CONNECTION

6.35 mm (0.25”) Nylon barb fitting for 3.175 mm (0.125”) to 4.762 mm (0.1875”) ID

tubing

CONDUIT CONNECTION

1/2” NPT conduit or cable gland

ENCLOSURE

Grey Polycarbonate UL-94-V0, IP65 (NEMA 4X)

APPROVALS

CE, ROHS

COUNTRY OF ORIGIN

Canada

SPECIFICATIONS

96.27 mm

3.79"

49.27 mm

1.94"

112.5 mm

4.43"

53.7 mm

2.11"

116.5 mm

4.58"

99.7 mm

3.93"

0.5" NPT

0.5" NPT

112.5 mm

4.43"

99.7 mm

3.93"

53.7 mm

2.11"

116.5 mm

4.585"

CABLE GLAND FITTING

THREAD ADAPTER 1/2” NPT TO M16

ACCESSORIES - INCLUDED WITH F ENCLOSURE OPTION