Model 14C

General Purpose Survey Meter

Part Number: 48-1611

Features

• Low Price
• Rugged
• 5-Range Analog Ratemeter
• Operates Two Detectors
  • Built-in Internal GM Detector (0 to 2000 mR/hr)
  • External GM or Scintillation Detector

This general purpose, handheld analog ratemeter supports operating two separate radiation detectors. A switch allows the user to select between the internally mounted GM detector with an exposure range of 0 - 20 mSv/h (0 - 2000 mR/hr) or an external GM or scintillator detector of choice (see table below).

The cast aluminum instrument housing, with its separate battery compartment and accompanying metal handle, offer an industrial robustness and quality that promote long-lasting protection and instrument life. The front-panel controls include a rotary switch for selecting the five-decade range and instrument shut-off, an audio on/off switch, a fast/slow response switch, a high voltage display button, and a battery test button.

The analog meter face comes in a variety of options to support the measurement units and ranges for the additional external detector selected. A one meter (39 in.) straight type detector cable with "C" style connector is included in the price of the instrument.

• Specifications
• Meter Faces
• Compatible Detectors
• Options
• Documents
• Video
• Replacement Parts

• Specifications
• Meter Faces
• Compatible Detectors
• Options
• Documents
• Video
• Replacement Parts

Specifications

Application	Alpha, Beta, and Gamma surveying
Internal Detector	Energy compensated GM (used with ×1000 scale only) Range: 0 to 20 mSv/hr (0 to 2000 mR/hr)  Sensitivity: 200 cpm per mR/hr
Compatible External Detectors	Any GM or Scintillation type operating on 900 VDC (see Compatible Detectors tab)
Detector Channels	External Detector: ×0.1 through ×100 range settings Internal GM Detector: ×1000 setting
Energy Response	Within 15% of true value between 60 keV to 3 MeV (internal detector only)
Linearity	Reading within 10% of true value with detector connected
Meter Dial	0 - 2 mR/hr, 0 - 5 kcpm, BAT TEST (Meter Faces tab lists other available meter faces)
Meter	6.4 cm (2.5 in.) arc, 1 mA analog type
Controls	Rotary Selector Switch: Switches between: Off; Ranges: ×0.1, ×1, ×10, ×100, ×1000 Response Switch: Toggles between FAST (4 s) or SLOW (22 s) from 10% to 90% of final reading Reset Push Button: Zeroes meter Battery Push Button: Checks battery status Audio Switch: Audio on/off, built-in unimorph speaker, greater than 60 dB at 0.6 m (2 ft)
High Voltage	900 Vdc
Threshold	-40 mV to 10 mV
Temperature Range	-20 to 50 °C (-4 to 122 °F)
Relative Humidity	< 95%
Power	2 each "D" cell batteries (housed in an externally accessible sealed compartment)
Battery Life	Typically greater than 2000 hours (battery condition can be checked on meter)
Construction	Cast and drawn aluminum with beige powder coat
Connector	Series "C" (others available)
Size (H x W x L)	16.5 × 8.9 × 21.6 cm (6.5 × 3.5 × 8.5 in.)
Weight	1.6 kg (3.5 lb), including batteries

---

Meter Faces

This table lists the most commonly used meter faces. Others are available upon request.

 

Meter Face	Image (click to view larger)	Description	Detectors
202-085		0 - 2 mR/hr BAT TEST	Model 44-7
202-330		0 - 4 kcpm 0 - 2 mR/hr BAT TEST	Model 44-7
202-627		0 - 2 mR/hr BAT TEST	Model 44-9
202-084		0 - 2 mR/hr BAT TEST	Model 44-6 Model 44-38
202-608		0 - 6.6 kcpm 0 - 2 mR/hr BAT TEST	Model 44-9 Model 44-9-18 Model 44-40 Model 44-88 Model 44-89 Model 44-94
202-241		0 - 2 mR/hr 0 - 2.4 kcpm BAT TEST	Model 44-6 Model 44-38
202-379		0 - 20 µSv/h BAT TEST	Model 44-6 Model 44-38
202-859		0 to 5 kcpm 0 to 2 mR/hr BAT TEST	Any
202-1096		0 - 20 µSv/h BAT TEST	Model 44-7
202-676		0 - 4.2 kcpm 0 - 20 µSv/hr BAT TEST	Model 44-7

---

Compatible Detectors

Model 44-7

Alpha-Beta-Gamma Detector

Model 44-9

 Alpha-Beta-Gamma Detector

Model 44-88

 Alpha-Beta-Gamma Detector

Model 44-89

 Alpha-Beta-Gamma Detector

Model 44-94

 Alpha-Beta-Gamma Detector

Gamma GM Detector

Model 44-38

Gamma GM Detector

Model 44-2

Gamma Scintillator Detector

Model 44-3

Low-Energy Gamma Scintillator Detector

---

Options

Option	Description	Part Number
Portable Scaler Option	Adds scaler counting capability. Includes digital readout, count time selector switch, and count control button.	4464-114
Overload Indicator Option	Adds Overload indicator with a light.	4464-130
Lighted Handle	Handle with LED to illuminate the instrument display.	4464-154
Shoulder Strap	Adjustable nylon shoulder strap.	4363-413
Headphone Jack	Adds headphone jack to instrument.	4464-464
Stereo/Mono Headphones	Adjustable stereo/mono headphones.	22-9313
Transport & Storage Case - Small	Rugged, dust- and waterproof transport and storage case.	2311062
Plastic Disk Check Sources	General purpose check sources used to check instrument response.	Depends on source material and activity.
Mechanical Check Source Holder	Check source holder with swing-away door that attaches to instrument housing.	4062-166
Stick-On Check Source Holder	Adhesive check source holder that attaches to instrument housing.	4464-473

---

Documents

• Data Sheet
• Product Manual
• CE Certificate

---

Video

Model 14C Overview

 

---

Replacement Parts

Description	Part Number
Internal GM Tube Assembly	4331-020

---