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  • PHONE : +62-851030-19945,+62-877-8055 3773, +62-877-8055-3430
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TEK-AIR FLOWMETER - APEX-BASIC SERIES - HIGH PERFORMANCE VELOCITY ALARM

 

Tek-Air is proud to introduce the APEX Basic Velocity Alarm to the Critical Environments Industry. The APEX Basic was developed by Tek-Air to provide the industry with a cost-effective, accurate and reliable velocity alarm to help ensure a safe operating environment for laboratory personnel. The APEX Basic is suited for use on all types of fume hoods and Biological Safety Cabinets.

Tek-Air Apex Basic

 

The Apex Basic is installed directly onto the exterior of the device which it is monitoring - fume hood (FH) or biological safety cabinet (BSC). For FH applications, a small probe is provided which is to be installed on the interior sidewall of the hood. This probe is connected to the Apex Basic using a very small (¼” O.D.) tubing which is also provided. For BSC applications, a duct static pressure probe is used in lieu of the sidewall probe and is to be installed into the exhaust duct serving the BSC. The Apex Basic measures airflow by drawing an extremely small amount air from the room through the front reference port (see front view drawing), through the internal air flow sensor and exits through the sidewall probe or static pressure probe. The airflow measured by the sensor is proportional to the FH face velocity and the BSC duct static pressure. If at any time the velocity drops below the calibrated alarm set point, the Apex Basic goes into full alarm mode; audible alarm sounds, mute button is initialized, red LED flashes and the alarm relay changes state. The operator may silence the alarm by pressing the mute button; however the red LED and relay remain the same until the alarm condition has been cleared.

.Applications
All types of fumehoods and biological safety cabinets

Advantages
Simple to Install and Operate
Continuous Monitoring of Velocity
Reliable, Accurate and Fast Speed of Response
Unoccupied Mode - Digital Input
Alarm Status to BAS - Alarm Relay
Visual Status Indicators
Audible Alarm

SPECIFICATION OF APEX-BASIC :

LED INDICATORS
Type: ultra bright clear lens
Green: indicates normal condition
Red: indicates alarm condition, flashes

AUDIBLE HORN
Sound Level: 90 dB at 10cm
Operation: horn sounds during alarm condition
Re-Beep Mode: (single fast tone every 2 minutes) provides reminder
horn muted and alarm not cleared

ALARM CONTACTS
Type: SPDT relay
Specifications: 1A @ 30 VDC, 0.5A @ 125 VAC (resistive load)
Operation: on alarm, N.O. contact closes and N.C. contact opens

DIGITAL INPUT
Type: dry contact input
Operation: when digital input is grounded (via dry contact) audible
alarm horn will silence ONLY, re-beep mode active

PUSH BUTTON
Mute: silences horn, enables re-beep mode, resets automatically
after alarm condition is cleared.

VELOCITY RANGE
30 – 2,000 FPM

ACCURACY
+/- 5% of set point

INPUT POWER
Voltage: 15VDC +/- 20% provided by class II UL approved wall
pluggable power supply

ENVIRONMENT
Temperature: Storage: 0°F to 150°F
Operating: 60°F to 80°F
Humidity: Storage: 10% to 90% RH, non-condensing
Operating: 20% RH to 90% RH, non-
condensing

VELOCITY SENSOR
Type: micro-bridge mass flow sensor
Overpressure: 25 PSI

REFERENCE PROBE
Internal: integrated to display face, no external probe required

HOOD PROBE
Type: 7/16” diameter, feed through bushing, press fit, 5’ tubing
Material: polyethylene
Tubing Type: .170” ID, ¼” OD clear
Tubing Material: ester based polyurethane

PHYSICAL CHARACTERISTICS
Size: 2.76” W x 4.5”H x 1.25”D
Weight: less than 5oz.
Materials: enclosure front & back; white ABS plastic

 

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