Sentry · v1.2 · Optical fluid sensor

Sentry 1.2

Sentry connects directly to the loops within your system, automatically sampling and testing fluid to monitor trends and anomalies in real time.

Multi-channel sensing gives a continuous window into the microscopic health of the cooling loop.

  • pH
  • Total alkalinity
  • Conductivity
  • Temperature
  • Glycol concentration
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Omen Sentry 1.2, a 4U rack-mount fluid sensor
[Fig 1.A]7" × 19" × 18" · 4U
Anatomy

Everything on the faceplate.

Omen Sentry 1.2, a 4U rack-mount fluid sensor with coolant quick-disconnects on the faceplate
[Fig 2.A]Faceplate overview
How it works

Parallel bypass. The loop never stops.

4U · RACKSENTRY 1.2COOLING LOOPRACKS · CDUSUPPLYRETURNMQTT · mTLSMODBUS TCP/IPOMEN CLOUDANALYSIS AND ALERTINGFACILITY BMSRJ45 ETHERNETPARALLEL BYPASS · 0-80 PSI · 0-65 °C
[Fig 3.A] System Overview
  1. 01

    Connect

    Two 1/2" OCP UQD08 couplings tap the loop in parallel bypass. Primary flow is untouched.

  2. 02

    Sample

    Sentry draws fluid from the bypass automatically and runs multi-channel analysis on every sample.

  3. 03

    Report

    Readings stream to Omen Cloud over MQTT and to the facility BMS over Modbus TCP/IP.

Sensor telemetry

Every reading, against its band.

Each parameter is shown beside its healthy band, and leaving the band opens an alert.

Secondary Loop // Sentry-1.2

No open alerts

In band
4 / 4
Open alerts
0
Status
Monitoring
  • pHIn band

    8.36pH

    Band 8.00-9.00 pH

  • Total alkalinityIn band

    183ppm

    Band 120-240 ppm

  • GlycolIn band

    25.1% v/v

    Band 23.0-27.0 % v/v

  • Fluid temperatureIn band

    36.4°C

    Band 25.0-45.0 °C

[Fig 4.A]Illustrative data
Specifications

Sentry 1.2 datasheet

01Sensing capabilities

ParameterMeasuring rangeAccuracyPrecision
pHpH 2 to 12±0.1 pH±0.05 pH
Total alkalinity50-300 ppm±10 ppm±5 ppm
Refractometry0% to 50% v/v±0.50% v/v±0.50% v/v

  • pH

    Range
    pH 2 to 12
    Accuracy
    ±0.1 pH
    Precision
    ±0.05 pH

  • Total alkalinity

    Range
    50-300 ppm
    Accuracy
    ±10 ppm
    Precision
    ±5 ppm

  • Refractometry

    Range
    0% to 50% v/v
    Accuracy
    ±0.50% v/v
    Precision
    ±0.50% v/v

02Physical

Dimensions
7" × 19" × 18" (H × W × D)
Form factor
4U, 19" rack mount
Connector
1/2" OCP universal quick disconnect (UQD08 plug)
Installation
Parallel bypass
Fluid pressure
0 PSI to 80 PSI
Fluid temperature
0 °C to 65 °C
Input voltage
86-264 VAC single phase
Power
15 W continuous, 100 W peak

03Connectivity & integration

Digital interface
Modbus TCP/IP
Network
RJ45 Ethernet
MQTT
Lightweight, low-bandwidth messaging optimized for high-reliability telemetry

See Sentry on your loop.

Walk through installation, telemetry and integration with the Omen team.

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