EWS Series Temperature Sensor — Specifications

Enclosure Material: ABS

Dimensions: 45 (H) × 54 (W) × 79 mm (L) (1.78 × 2.12 × 3.12")

Maximum Temperature: 60°C (140°F)

Accuracy: ±1.1°C (1.98°F)

EWS-TC Thermocouple Models

Specification

Value

Sensor Type

J, K, T, E

Sensor Lead Length

1 m (40")

Lead Material

24 AWG wire with PFA coating

Maximum Temperature

60°C (140°F)

Accuracy

±1°C (1.8°F)

EWS-RTD RTD Models

Specification

Value

Sensor Type

100 Ω platinum, 0.00385

Sensor Lead Length

1 m (40")

Lead Material

PFA-insulated, 3-conductor 26 AWG nickel-plated copper stranded wire

Maximum Temperature

60°C (140°F)

Accuracy

±1°C (1.8°F)

EWS-TH Thermistor Models

Specification

Value

Sensor Type

OMEGA® 400 series, 2252 Ω @ 25°C

Sensor Lead Length

1 m (40")

Lead Material

PFA-insulated, 2-conductor 22 AWG nickel-plated copper stranded wire

Maximum Temperature

60°C (140°F)

Accuracy

±0.2°C (0.36°F)

EWS-TX Temperature Transmitter

Specification

Value

Range

–18 to 57°C (0 to 135°F)

Accuracy @ 25°C

±0.7°C (±1.2°F) in still air; ±1.4°C (±2.5°F) over full range

Accuracy in moving air

±1.4°C (±2.5°F) @ 25°C; ±1.7°C (±3°F) over full range

Repeatability

±0.3°C (±0.5°F)

Output

4–20 mA or 1–5 Vdc (calibrated over full range)

Temperature Time Constant (63.2% response)

9 s (1 m/s) in moving air; 30 s in still air

Operating Power

8–18 Vdc @ 20 mA

Max Loop Resistance

Ω = (V supply – 8 V) / 0.02 A

Sensor Type

Solid-state

EWS-RH Temperature/Humidity Transmitter

Specification

Value

Range

5–95% RH (non-condensing)

Accuracy @ 25°C

±4% RH at 5–20% RH; ±3% RH at 20–80% RH; ±4% RH at 80–95% RH

Repeatability

±1% RH

Output

4–20 mA or 1–5 Vdc (calibrated over 0–100% RH)

Operating Power

8–18 Vdc @ 20 mA

Max Loop Resistance

Ω = (V supply – 8 V) / 0.02 A

RH Time Constant

100 s for RH increase from 20% to 90%; 60 s for RH decrease from 90% to 20%

EWS-BP-A Barometric Pressure Transmitter

Specification

Value

Sensor Type

Thin-film solid-state capacitive (see temperature transmitter for temperature specs)

Pressure Range

20.8–32 inHg (10.2–15.7 psi)

Temperature Compensation

Full range

Accuracy

±1% of full scale @ 25°C (77°F); ±0.11%/°C (0.06%/°F)

Operating Temperature

0–60°C (32–140°F)

Output

User-selectable 4–20 mA or 1–5 Vdc

Operating Power

8–18 Vdc @ 20 mA

Max Loop Resistance

Ω = (V supply – 8 V) / 0.02 A

Media Compatibility

Clean, dry air and non-corrosive gases

EWS Series — Ordering Guide

Model

Description

EWS-TC-(*)

Thermocouple sensor

EWS-RTD

RTD sensor (100 Ω platinum, 0.00385)

EWS-TH

400 series thermistor sensor

EWS-TX

Temperature transmitter

EWS-RH

Temperature/humidity transmitter

EWS-BP-A

Barometric pressure transmitter

EWS-MB

Conduit box mounting bracket / wall adapter plate kit

PSR-24S

Regulated power supply, US plug, 90–264 Vac input, 24 Vdc output, 400 mA, screw terminals, UL

PSR-24L

Regulated power supply, US plug, 90–264 Vac input, 24 Vdc output, 400 mA, bare wire leads, UL

PSR-24L-230

Regulated power supply, European plug, 230 Vac input, 24 Vdc output, 400 mA, bare wire leads, CE

TX4-100

4-conductor shielded transmitter cable, 30.5 m (100’)

Notes:

* Specify thermocouple type: J, K, T, or E

“-TC” and “-TH” models include 1 m (40") leads. For longer leads, add suffix “-(#)FT”; additional charge applies per foot for lengths exceeding 3 ft.

“-RTD” models include 1 m (40") leads; additional charge applies per foot.

Ordering Example: EWS-TC-K-8FT — Wall-mount K-type thermocouple sensor with 8 ft lead wire.