One record, two sensors
Same bath, reference, session; two serials, one sheet.
Component family
Sensors and gateways for CDU telemetry
| EMS-TL-ST | Matched pair, thermowell, −40 to +150 °C |
|---|---|
| EMS-TL-STC | Matched clamp-on pair |
| EMS-TL-SF | Electromagnetic, DN25 0.5–18 m³/h |
| EMS-TL-SFU | Ultrasonic, no floor |
| EMS-TL-SDP | ±0.075 % FS |
| EMS-TL-SL | Cable 0–75 °C |
| EMS-TL-SK | 4-wire detects and locates |
| EMS-TL-G10 | 10 points, to 50 |
| EMS-TL-G25 | 25 points, our own build |
| EMS-TL-G50 | 50 points, ceiling |
Pairing rule
One replacement sensor breaks the pairing
The rule that bites
ΔT uncertainty goes above 50 % on a 5–10 °F difference.
Two ways onto the pipe
EMS-TL-ST takes a thermowell, EMS-TL-STC clamps on.
Flow instruments
Which flow instrument is correct for my fluid
| EMS-TL-SF electromagnetic | EMS-TL-SFU ultrasonic |
|---|---|
| Needs 5 µS/cm | No minimum |
| ±0.5 % of reading, ±0.2 % special | On request |
| Velocity 0.3–10 m/s, cut-off 0.1 m/s | In-line beats clamp-on |
| Static pressure 1.6 MPa | Clamp-on needs wall thickness |
| Liner: rubber −5…90 °C, neoprene 0…80, PTFE −25…90 | De-ionised 0.2–20 µS/cm |
Straight runs: 5× DN upstream, 3× DN downstream. Omitting them costs 1.5 % of reading.
Differential pressure
The static-pressure trap
| Statics, low range | ±1 % URL per 6.9 MPa |
|---|---|
| Statics, most ranges | ±0.25 % |
| Accuracy | ±0.075 % FS, ±0.05 % high |
| Compression | 10:1, 100:1 optional |
| Stability | ±0.1 % per 12 months |
A rack CDU controls TCS pressure drop over 30–150 kPa (4.4–21.8 psi). All figures are percent of full scale.
Liquid level
Three level jobs, three channels
Point types: relay or digital input; analogue types 4–20 mA or Modbus. Analogue accuracy on request.
Leak input
What a rope input can cover
Rope rating, PG by weight
35%
A competing vendor tests
10–55% PG
Construction
4-wiredetects, locates
Cable lengths
3–100ft (0.91–30.48 m)
A 55 % premix sits outside that envelope, taking the tray probe. Codes from the EMS-LD- line.
Gateway
Size the gateway from the point list
- EMS-TL-G1010 points5 universal inputs
- EMS-TL-G2525 points, our own configurationcontroller plus expansion module
- EMS-TL-G5050 pointsup to 3 devices
IO and protocols
What the gateway accepts
Terminals
| Universal inputs | Thermistor Type 3 / 10K, 0–100 kΩ, 0–10 V DC, 0–20 mA, dry contact |
|---|---|
| Analog outputs | 0–10 V DC, 4 mA max |
| Digital outputs | 3 × triac, 24 V AC, 0.5 A |
| Supply | 24 VAC/DC |
Protocols and envelope
| Comms | 1 × RS-485, 2 × Ethernet |
|---|---|
| Over IP | BACnet/IP, Modbus, SNMP |
| Over RS-485 | BACnet, Modbus |
| Operating | −20 to 60 °C |
| Storage | −40 to 85 °C |
| Humidity | 5–95 % RH |
| MTBF | 10 years |
Built to UL 916, C-UL, CE, FCC Part 15 Class B, RoHS2, REACH, WEEE.
Wetted materials
The material question decides seal life
Acceptable in the loop
316L stainless steel, peroxide-cured EPDM, Viton, FEP, PTFE, HDPE, PEEK, PP-R.
Excluded
Free iron, plain carbon steel.
Brass above 15 % zinc
Verify to ISO 6509 at ≤100 µm depth; annual ICP zinc analysis where wetted.
Sulfur-cured EPDM
Discouraged against peroxide cure; shows as sulfate below 10 ppm.